| otoplasty | (noun) reconstructive surgery of the auricle of the external ear | - |
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| overtop | (verb) look down on | Synonyms: command, dominate, overlook |
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| palatopharyngoplasty | (noun) surgical resection of unnecessary palatal and oropharyngeal tissue to open the airway; intended to cure extreme cases of snoring (with or without sleep apnea) | Synonyms: PPP, UPPP, uvulopalatopharyngoplasty |
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| pancytopenia | (noun) an abnormal deficiency in all blood cells (red blood cells and white blood cells and platelets); usually associated with bone marrow tumor or with aplastic anemia | - |
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| photophobia | (noun) pain in the eye resulting from exposure to bright light (often associated with albinism) | Synonyms: photalgia |
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| (noun) a morbid fear of light | - |
| photopigment | (noun) a special pigment found in the rods and cones of the retina | - |
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| phytophagic | (adjective) (of animals) feeding on plants | Synonyms: phytophagous, phytophilous, plant-eating |
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| phytophagous | (adjective) (of animals) feeding on plants | Synonyms: phytophagic, phytophilous, plant-eating |
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| phytophilous | (adjective) (of animals) feeding on plants | Synonyms: phytophagic, phytophagous, plant-eating |
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| phytoplankton | (noun) photosynthetic or plant constituent of plankton; mainly unicellular algae | - |
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| pneumatophore | (noun) an air-filled root (submerged or exposed) that can function as a respiratory organ of a marsh or swamp plant | - |
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| postoperative | (adjective) happening or done after a surgical operation | - |
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| postoperatively | (adverb) after the operation | - |
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| proctoplasty | (noun) reconstructive surgery of the anus or rectum | Synonyms: rectoplasty |
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| protoceratops | (noun) small horned dinosaur | - |
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| protoplasm | (noun) the substance of a living cell (including cytoplasm and nucleus) | Synonyms: living substance |
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| protoplast | (noun) a biological unit consisting of a nucleus and the body of cytoplasm with which it interacts | Synonyms: energid |
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| radioisotope | (noun) a radioactive isotope of an element; produced either naturally or artificially | - |
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| rectoplasty | (noun) reconstructive surgery of the anus or rectum | Synonyms: proctoplasty |
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| rooftop | (noun) the top of a (usually flat) roof | - |
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| scatophagy | (noun) the eating of excrement or other filth | - |
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| screwtop | (noun) the top of a container that must be screwed off and on | - |
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| shortstop | (noun) the fielding position of the player on a baseball team who is stationed between second and third base | Synonyms: short |
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| (noun) (baseball) the person who plays the shortstop position | - |
| showstopper | (noun) something that is strikingly attractive or has great popular appeal | Synonyms: show-stopper |
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| (noun) an act so striking or impressive that the show must be delayed until the audience quiets down | Synonyms: show-stopper, stopper |
| spermatophyte | (noun) plant that reproduces by means of seeds not spores | Synonyms: phanerogam, seed plant |
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| steatopygia | (noun) an extreme accumulation of fat on the buttocks | - |
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| stomatopod | (noun) a kind of crustacean | Synonyms: stomatopod crustacean |
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| stop | (noun) the act of stopping something | Synonyms: stoppage |
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| (noun) a brief stay in the course of a journey | Synonyms: layover, stopover |
| (noun) a restraint that checks the motion of something | Synonyms: catch |
| (noun) an obstruction in a pipe or tube | Synonyms: block, blockage, closure, occlusion, stoppage |
| (noun) a mechanical device in a camera that controls size of aperture of the lens | Synonyms: diaphragm |
| (noun) (music) a knob on an organ that is pulled to change the sound quality from the organ pipes | - |
| (noun) a consonant produced by stopping the flow of air at some point and suddenly releasing it | Synonyms: occlusive, plosive, plosive consonant, plosive speech sound, stop consonant |
| (noun) a punctuation mark (.) placed at the end of a declarative sentence to indicate a full stop or after abbreviations | Synonyms: full point, full stop, period, point |
| (noun) the event of something ending | Synonyms: halt |
| (noun) a spot where something halts or pauses | - |
| (noun) the state of inactivity following an interruption | Synonyms: arrest, check, halt, hitch, stay, stoppage |
| (verb) prevent completion | Synonyms: break, break off, discontinue |
| (verb) stop and wait, as if awaiting further instructions or developments | Synonyms: hold on |
| (verb) hold back, as of a danger or an enemy; check the expansion or influence of | Synonyms: arrest, check, contain, hold back, turn back |
| (verb) seize on its way | Synonyms: intercept |
| (verb) render unsuitable for passage | Synonyms: bar, barricade, block, block off, block up, blockade |
| (verb) come to a halt, stop moving | Synonyms: halt |
| (verb) cause to end | - |
| (verb) interrupt a trip | Synonyms: stop over |
| (verb) stop from happening or developing | Synonyms: block, halt, kibosh |
| (verb) put an end to a state or an activity | Synonyms: cease, discontinue, give up, lay off, quit |
| (verb) have an end, in a temporal, spatial, or quantitative sense; either spatial or metaphorical | Synonyms: cease, end, finish, terminate |
| stopcock | (noun) faucet consisting of a rotating device for regulating flow of a liquid | Synonyms: cock, turncock |
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| stopgap | (noun) something contrived to meet an urgent need or emergency | Synonyms: make-do, makeshift |
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| stoplight | (noun) a visual signal to control the flow of traffic at intersections | Synonyms: traffic light, traffic signal |
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| (noun) a red light on the rear of a motor vehicle that signals when the brakes are applied to slow or stop | Synonyms: brake light |
| stopover | (noun) a brief stay in the course of a journey | Synonyms: layover, stop |
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| (noun) a stopping place on a journey | Synonyms: way station |
| stoppable | (adjective) capable of being stopped | - |
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| stoppage | (noun) the act of stopping something | Synonyms: stop |
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| (noun) an obstruction in a pipe or tube | Synonyms: block, blockage, closure, occlusion, stop |
| (noun) the state of inactivity following an interruption | Synonyms: arrest, check, halt, hitch, stay, stop |
| stopped | (adjective) (of a nose) blocked | Synonyms: stopped-up, stopped up |
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| stopper | (noun) blockage consisting of an object designed to fill a hole tightly | Synonyms: plug, stopple |
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| (noun) (bridge) a playing card with a value sufficiently high to insure taking a trick in a particular suit | - |
| (noun) an act so striking or impressive that the show must be delayed until the audience quiets down | Synonyms: show-stopper, showstopper |
| (noun) a remark to which there is no polite conversational reply | Synonyms: conversation stopper |
| (verb) close or secure with or as if with a stopper | Synonyms: stopple |
| stoppered | (adjective) (of a container) having a stopper in the opening | - |
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| stopping | (noun) the kind of playing that involves pressing the fingers on the strings of a stringed instrument to control the pitch | - |
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| (noun) fastener consisting of a narrow strip of welded metal used to join steel members | Synonyms: fillet |
| stopple | (noun) blockage consisting of an object designed to fill a hole tightly | Synonyms: plug, stopper |
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| (verb) close or secure with or as if with a stopper | Synonyms: stopper |
| stops | (noun) a gambling card game in which chips are placed on the ace and king and queen and jack of separate suits (taken from a separate deck); a player plays the lowest card of a suit in his hand and successively higher cards are played until the sequence stops; the player who plays a card matching one in the layout wins all the chips on that card | Synonyms: boodle, Chicago, Michigan, Newmarket |
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| stopwatch | (noun) a timepiece that can be started or stopped for exact timing (as of a race) | Synonyms: stop watch |
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| subtopia | (noun) monotonous urban sprawl of standardized buildings | - |
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| tabletop | (noun) the top horizontal work surface of a table | - |
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| thanatophobia | (noun) a morbid fear of death | - |
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| thanatopsis | (noun) an essay expressing a view on the subject of death | - |
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| thrombocytopenia | (noun) a blood disease characterized by an abnormally small number of platelets in the blood | Synonyms: thrombopenia |
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| tiptop | (adjective) of the highest quality | Synonyms: A-one, ace, crack, first-rate, super, top-notch, topnotch, tops |
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| (noun) the extreme top or summit | - |
| (noun) the highest level or degree attainable; the highest stage of development | Synonyms: acme, elevation, height, meridian, peak, pinnacle, summit, superlative, top |
| top | (adjective) situated at the top or highest position | - |
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| (noun) a garment (especially for women) that extends from the shoulders to the waist or hips | - |
| (noun) covering for a hole (especially a hole in the top of a container) | Synonyms: cover |
| (noun) a canvas tent to house the audience at a circus performance | Synonyms: big top, circus tent, round top |
| (noun) a conical child's plaything tapering to a steel point on which it can be made to spin | Synonyms: spinning top, teetotum, whirligig |
| (noun) platform surrounding the head of a lower mast | - |
| (noun) the greatest possible intensity | - |
| (noun) the highest or uppermost side of anything | Synonyms: top side, upper side, upside |
| (noun) the upper part of anything | - |
| (noun) the top or extreme point of something (usually a mountain or hill) | Synonyms: crest, crown, peak, summit, tip |
| (noun) the highest level or degree attainable; the highest stage of development | Synonyms: acme, elevation, height, meridian, peak, pinnacle, summit, superlative, tiptop |
| (noun) the first half of an inning; while the visiting team is at bat | Synonyms: top of the inning |
| (verb) be the culminating event | Synonyms: crown |
| (verb) finish up or conclude | Synonyms: top off |
| (verb) cut the top off | Synonyms: pinch |
| (verb) strike (the top part of a ball in golf, baseball, or pool) giving it a forward spin | - |
| (verb) pass by, over, or under without making contact | Synonyms: clear |
| (verb) reach or ascend the top of | - |
| (verb) provide with a top or finish the top (of a structure) | Synonyms: top out |
| (verb) be superior or better than some standard | Synonyms: exceed, go past, overstep, pass, transcend |
| (verb) be at the top of or constitute the top or highest point | - |
| (verb) be ahead of others; be the first | Synonyms: lead |
| topaz | (noun) a light brown the color of topaz | Synonyms: tan |
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| (noun) a mineral (fluosilicate of aluminum) that occurs in crystals of various colors and is used as a gemstone | - |
| (noun) a yellow quartz | Synonyms: common topaz, false topaz |
| topcoat | (noun) a heavy coat worn over clothes in winter | Synonyms: greatcoat, overcoat |
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| topdress | (verb) scatter manure or fertilizer over (land) | - |
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| tope | (noun) a dome-shaped shrine erected by Buddhists | Synonyms: stupa |
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| (verb) drink excessive amounts of alcohol; be an alcoholic | Synonyms: drink |
| topee | (noun) a lightweight hat worn in tropical countries for protection from the sun | Synonyms: pith hat, pith helmet, sun helmet, topi |
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| toper | (noun) a person who drinks alcoholic beverages (especially to excess) | Synonyms: drinker, imbiber, juicer |
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| topgallant | (noun) a mast fixed to the head of a topmast on a square-rigged vessel | Synonyms: topgallant mast |
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| (noun) a sail set on a yard of a topgallant mast | Synonyms: topgallant sail |
| tophus | (noun) an incrustation that forms on the teeth and gums | Synonyms: calculus, tartar |
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| (noun) a deposit of urates around a joint or in the external ear; diagnostic of advanced or chronic gout | Synonyms: chalkstone |
| topi | (noun) a large South African antelope; considered the swiftest hoofed mammal | Synonyms: Damaliscus lunatus, sassaby |
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| (noun) a lightweight hat worn in tropical countries for protection from the sun | Synonyms: pith hat, pith helmet, sun helmet, topee |
| topiary | (noun) making decorative shapes by trimming shrubs or trees | - |
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| (noun) a garden having shrubs clipped or trimmed into decorative shapes especially of animals | - |
| topic | (noun) some situation or event that is thought about | Synonyms: issue, matter, subject |
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| (noun) the subject matter of a conversation or discussion | Synonyms: subject, theme |
| topical | (adjective) of or relating to or arranged by topics | - |
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| (adjective) of interest at the present time | - |
| (adjective) pertaining to the surface of a body part | - |
| topicality | (noun) the attribute of being of interest at the present time | - |
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| topicalization | (noun) (linguistics) emphasis placed on the topic or focus of a sentence by preposing it to the beginning of the sentence; placing the topic at the beginning of the sentence is typical for English | - |
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| topicalize | (verb) emphasize by putting heavy stress on or by moving to the front of the sentence | - |
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| topically | (adverb) to a restricted area of the body | Synonyms: locally |
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| topknot | (noun) showy crest or knot of hair or feathers | - |
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| (noun) headdress consisting of a decorative ribbon or bow worn in the hair | - |
| topknotted | (adjective) (of a bird or animal) having a usually ornamental tuft or process on the head; often used in combination | Synonyms: crested, tufted |
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| topless | (adjective) having no top | - |
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| (adjective) having the breasts uncovered or featuring such nudity | Synonyms: bare-breasted, braless |
| topmast | (noun) the mast next above a lower mast and topmost in a fore-and-aft rig | - |
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| topminnow | (noun) small usually brightly-colored viviparous surface-feeding fishes of fresh or brackish warm waters; often used in mosquito control | Synonyms: live-bearer, poeciliid, poeciliid fish |
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| (noun) freshwater fish of Central America having a long swordlike tail; popular aquarium fish | Synonyms: helleri, swordtail, Xyphophorus helleri |
| topmost | (adjective) at or nearest to the top | Synonyms: upmost, uppermost |
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| topnotch | (adjective) of the highest quality | Synonyms: A-one, ace, crack, first-rate, super, tiptop, top-notch, tops |
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| topognosia | (noun) recognition of the location of a stimulus on the skin | Synonyms: topognosis |
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| topognosis | (noun) recognition of the location of a stimulus on the skin | Synonyms: topognosia |
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| topographic | (adjective) concerned with topography | Synonyms: topographical |
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| topographical | (adjective) concerned with topography | Synonyms: topographic |
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| topographically | (adverb) with regard to topography | - |
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| topography | (noun) the configuration of a surface and the relations among its man-made and natural features | - |
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| (noun) precise detailed study of the surface features of a region | - |
| topolatry | (noun) the worship of places | Synonyms: place-worship |
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| topologic | (adjective) of or relating to topology | Synonyms: topological |
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| topological | (adjective) of or relating to topology | Synonyms: topologic |
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| topologically | (adverb) from the point of view of topology | - |
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| topology | (noun) the branch of pure mathematics that deals only with the properties of a figure X that hold for every figure into which X can be transformed with a one-to-one correspondence that is continuous in both directions | Synonyms: analysis situs |
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| (noun) the study of anatomy based on regions or divisions of the body and emphasizing the relations between various structures (muscles and nerves and arteries etc.) in that region | Synonyms: regional anatomy, topographic anatomy |
| (noun) topographic study of a given place (especially the history of the place as indicated by its topography) | - |
| (noun) the configuration of a communication network | Synonyms: network topology |
| toponomy | (noun) the branch of lexicology that studies the place names of a region or a language | Synonyms: toponymy |
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| (noun) the nomenclature of regional anatomy | Synonyms: toponymy |
| toponym | (noun) the name by which a geographical place is known | Synonyms: place name |
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| toponymy | (noun) the branch of lexicology that studies the place names of a region or a language | Synonyms: toponomy |
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| (noun) the nomenclature of regional anatomy | Synonyms: toponomy |
| topos | (noun) a traditional theme or motif or literary convention | - |
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| topped | (adjective) having a top of a specified character | - |
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| topper | (noun) a man's hat with a tall crown; usually covered with silk or with beaver fur | Synonyms: beaver, dress hat, high hat, opera hat, silk hat, stovepipe, top hat |
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| (noun) a woman's short coat | - |
| (noun) an exceedingly good witticism that surpasses all that have gone before | - |
| (noun) a worker who cuts tops off (of trees or vegetables etc.) | - |
| (noun) a worker who makes or adds the top to something | - |
| (noun) the person who is most outstanding or excellent; someone who tops all others | Synonyms: best |
| topping | (adjective) excellent; best possible | Synonyms: top-flight, top-hole |
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| (noun) a flavorful addition on top of a dish | - |
| toppingly | (adverb) (used as an intensifier) excellently | Synonyms: marvellously, marvelously, superbly, terrifically, wonderfully, wondrous, wondrously |
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| topple | (verb) fall down, as if collapsing | Synonyms: tumble |
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| (verb) cause to topple or tumble by pushing | Synonyms: tip, tumble |
| tops | (adjective) of the highest quality | Synonyms: A-one, ace, crack, first-rate, super, tiptop, top-notch, topnotch |
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| topsail | (noun) a sail (or either of a pair of sails) immediately above the lowermost sail of a mast and supported by a topmast | - |
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| topside | (noun) (usually plural) weather deck; the part of a ship's hull that is above the waterline | - |
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| topsoil | (noun) the layer of soil on the surface | Synonyms: surface soil |
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| topspin | (noun) forward spin (usually of a moving ball) that is imparted by an upward stroke | - |
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| traumatophobia | (noun) a morbid fear of battle or physical injury | - |
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| treetop | (noun) the upper branches and leaves of a tree or other plant | Synonyms: crown |
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| triceratops | (noun) huge ceratopsian dinosaur having three horns and the neck heavily armored with a very solid frill | - |
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| tryptophan | (noun) an amino acid that occurs in proteins; is essential for growth and normal metabolism; a precursor of niacin | Synonyms: tryptophane |
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