| hydride | (noun) any binary compound formed by the union of hydrogen and other elements | - |
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| hydrochloride | (noun) a complex consisting of an organic base in association with hydrogen chloride | - |
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| hyperidrosis | (noun) excessive and profuse perspiration | Synonyms: hyperhidrosis, polyhidrosis |
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| iridaceous | (adjective) of or pertaining to or characteristic of plants of the family Iridaceae | - |
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| iridectomy | (noun) an eye operation that treats closed-angle glaucoma by surgical removal of part of the iris of the eye | - |
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| iridesce | (verb) be iridescent | - |
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| iridescence | (noun) the visual property of something having a milky brightness and a play of colors from the surface | Synonyms: opalescence |
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| iridescent | (adjective) having a play of lustrous rainbow colors | Synonyms: nacreous, opalescent, opaline, pearlescent |
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| (adjective) varying in color when seen in different lights or from different angles | Synonyms: changeable, chatoyant, shot |
| iridic | (adjective) of or relating to the iris of the eye | - |
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| (adjective) of or containing iridium | - |
| iridium | (noun) a heavy brittle metallic element of the platinum group; used in alloys; occurs in natural alloys with platinum or osmium | Synonyms: atomic number 77, Ir |
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| iridocyclitis | (noun) inflammation of the iris and ciliary body of the eye | - |
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| iridokeratitis | (noun) inflammation of the iris and cornea of the eye | - |
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| iridoncus | (noun) swelling of the iris of the eye | - |
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| iridosmine | (noun) a hard and corrosion resistant mineral that is a natural alloy of osmium and iridium (usually containing small amounts of rhodium and platinum); used in needles and pen nibs etc. | Synonyms: osmiridium |
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| iridotomy | (noun) a surgical procedure that makes an incision in the iris of the eye in order to enlarge the pupil or to treat closed-angle glaucoma | - |
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| irridenta | (noun) a region that is related ethnically or historically to one country but is controlled politically by another | Synonyms: irredenta |
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| irridentism | (noun) the doctrine that irredenta should be controlled by the country to which they are ethnically or historically related | Synonyms: irredentism |
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| irridentist | (noun) an advocate of irredentism | Synonyms: irredentist |
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| joyride | (noun) a ride in a car taken solely for pleasure | - |
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| (verb) ride in a car with no particular goal and just for the pleasure of it | Synonyms: tool, tool around |
| juridic | (adjective) relating to the administration of justice or the function of a judge | Synonyms: judicial, juridical |
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| (adjective) of or relating to the law or jurisprudence | Synonyms: juridical |
| juridical | (adjective) relating to the administration of justice or the function of a judge | Synonyms: judicial, juridic |
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| (adjective) of or relating to the law or jurisprudence | Synonyms: juridic |
| larid | (noun) long-winged web-footed aquatic bird of the gull family | - |
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| leporid | (noun) rabbits and hares | Synonyms: leporid mammal |
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| leporide | (noun) red breed of domestic rabbits; hybrid between Old World rabbit and hare | Synonyms: Belgian hare |
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| lurid | (adjective) shining with an unnatural red glow as of fire seen through smoke | - |
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| (adjective) ghastly pale | - |
| (adjective) glaringly vivid and graphic; marked by sensationalism | Synonyms: shocking |
| (adjective) horrible in fierceness or savagery | - |
| luridly | (adverb) in a lurid manner | - |
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| luridness | (noun) the quality of being ghastly | Synonyms: ghastliness, grimness, gruesomeness |
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| (noun) unnatural lack of color in the skin (as from bruising or sickness or emotional distress) | Synonyms: achromasia, lividity, lividness, paleness, pallidness, pallor, wanness |
| (noun) the journalistic use of subject matter that appeals to vulgar tastes | Synonyms: sensationalism |
| meperidine | (noun) a synthetic narcotic drug (trade name Demerol) used to treat pain | Synonyms: Demerol, meperidine hydrochloride |
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| meridian | (adjective) of or happening at noon | - |
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| (adjective) being at the best stage of development | Synonyms: prime |
| (noun) an imaginary great circle on the surface of the earth passing through the north and south poles at right angles to the equator | Synonyms: line of longitude |
| (noun) the highest level or degree attainable; the highest stage of development | Synonyms: acme, elevation, height, peak, pinnacle, summit, superlative, tiptop, top |
| meridional | (adjective) of or relating to a meridian | - |
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| (adjective) located in the south or characteristic of southern people or places | - |
| microsporidian | (noun) parasite of arthropods and fishes that invade and destroy host cells | - |
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| mirid | (noun) a variety of leaf bug | Synonyms: capsid, mirid bug |
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| monohybrid | (noun) a hybrid produced by crossing parents that are homozygous except for a single gene locus that has two alleles (as in Mendel's experiments with garden peas) | - |
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| monosaccharide | (noun) a sugar (like sucrose or fructose) that does not hydrolyse to give other sugars; the simplest group of carbohydrates | Synonyms: monosaccharose, simple sugar |
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| mucopolysaccharide | (noun) complex polysaccharides containing an amino group; occur chiefly as components of connective tissue | - |
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| mucopolysaccharidosis | (noun) any of a group of genetic disorders involving a defect in the metabolism of mucopolysaccharides resulting in greater than normal levels of mucopolysaccharides in tissues | - |
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| myxosporidian | (noun) mostly parasitic in fishes and including various serious pathogens | - |
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| nightrider | (noun) member of a secret mounted band in United States South after the American Civil War; committed acts of intimidation and revenge | Synonyms: night rider |
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| nitride | (noun) a compound containing nitrogen and a more electropositive element (such as phosphorus or a metal) | - |
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| oligosaccharide | (noun) any of the carbohydrates that yield only a few monosaccharide molecules on complete hydrolysis | - |
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| osmiridium | (noun) a hard and corrosion resistant mineral that is a natural alloy of osmium and iridium (usually containing small amounts of rhodium and platinum); used in needles and pen nibs etc. | Synonyms: iridosmine |
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| outride | (verb) ride better, faster, or further than | - |
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| (verb) hang on during a trial of endurance | Synonyms: last out, ride out, stay |
| outrider | (noun) an escort who rides ahead (as a member of the vanguard) | - |
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| override | (noun) the act of nullifying; making null and void; counteracting or overriding the effect or force of something | Synonyms: nullification |
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| (noun) a manually operated device to correct the operation of an automatic device | - |
| (verb) rule against | Synonyms: overrule, overthrow, overturn, reverse |
| (verb) ride (a horse) too hard | - |
| (verb) counteract the normal operation of (an automatic gear shift in a vehicle) | - |
| (verb) prevail over | - |
| overriding | (adjective) having superior power and influence | Synonyms: paramount, predominant, predominate, preponderant, preponderating |
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| oviraptorid | (noun) advanced carnivorous theropods, characterized by their toothless, parrot-like beaks and, in several cases, elaborate crests | - |
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| partridge | (noun) small Old World gallinaceous game birds | - |
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| (noun) a popular North American game bird; named for its call | Synonyms: bobwhite, bobwhite quail |
| (noun) valued as a game bird in eastern United States and Canada | Synonyms: Bonasa umbellus, ruffed grouse |
| (noun) heavy-bodied small-winged South American game bird resembling a gallinaceous bird but related to the ratite birds | Synonyms: tinamou |
| (noun) flesh of either quail or grouse | - |
| partridgeberry | (noun) creeping woody plant of eastern North America with shiny evergreen leaves and scarlet berries | Synonyms: boxberry, Mitchella repens, twinberry |
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| pepperidge | (noun) columnar tree of eastern North America having horizontal limbs and small leaves that emerge late in spring and have brilliant color in early fall | Synonyms: black gum, Nyssa sylvatica, sour gum |
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| perchloride | (noun) a chloride containing an unusually high proportion of chlorine | - |
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| peridinian | (noun) flagellate with a thick test composed of plates | - |
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| peridium | (noun) outer layer of the spore-bearing organ in many fungi | - |
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| peridot | (noun) a pale green variety of chrysolite; used as a gemstone | - |
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| peridotite | (noun) a dark coarse-grained igneous rock consisting principally of olivine | - |
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| phenazopyridine | (noun) analgesic (trade name Pyridium) used to treat urinary tract infections | Synonyms: Pyridium |
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| pierid | (noun) any of numerous pale-colored butterflies having three pairs of well-developed legs | Synonyms: pierid butterfly |
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| polysaccharide | (noun) any of a class of carbohydrates whose molecules contain chains of monosaccharide molecules | Synonyms: polyose |
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| porridge | (noun) soft food made by boiling oatmeal or other meal or legumes in water or milk until thick | - |
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| postmeridian | (adjective) after midday | - |
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| pride | (noun) unreasonable and inordinate self-esteem (personified as one of the deadly sins) | Synonyms: superbia |
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| (noun) the trait of being spurred on by a dislike of falling below your standards | - |
| (noun) a feeling of self-respect and personal worth | Synonyms: pridefulness |
| (noun) satisfaction with your (or another's) achievements | - |
| (noun) a group of lions | - |
| (verb) be proud of | Synonyms: congratulate, plume |
| prideful | (adjective) joyful and proud especially because of triumph or success | Synonyms: exultant, exulting, jubilant, rejoicing, triumphal, triumphant |
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| (adjective) having or showing arrogant superiority to and disdain of those one views as unworthy | Synonyms: disdainful, haughty, imperious, lordly, overbearing, sniffy, supercilious, swaggering |
| pridefulness | (noun) a feeling of self-respect and personal worth | Synonyms: pride |
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| pteridological | (adjective) of or relating to the study of ferns | - |
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| pteridologist | (noun) an expert in the study of ferns | - |
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| pteridology | (noun) the branch of botany that studies ferns | - |
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| pteridophyte | (noun) plants having vascular tissue and reproducing by spores | Synonyms: nonflowering plant |
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| pteridosperm | (noun) an extinct seed-producing fernlike plant of the order Cycadofilicales (or group Pteridospermae) | Synonyms: seed fern |
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| putrid | (adjective) of or relating to or attended by putrefaction | - |
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| (adjective) morally corrupt or evil | - |
| (adjective) in an advanced state of decomposition and having a foul odor | - |
| putridity | (noun) the state of being putrid | - |
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| putridness | (noun) in a state of progressive putrefaction | Synonyms: corruption, putrescence, rottenness |
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| pyridine | (noun) a toxic colorless flammable liquid organic base with a disagreeable odor; usually derived from coal | - |
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| pyridoxal | (noun) a B vitamin that is essential for metabolism of amino acids and starch | Synonyms: adermin, pyridoxamine, pyridoxine, vitamin B6 |
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| pyridoxamine | (noun) a B vitamin that is essential for metabolism of amino acids and starch | Synonyms: adermin, pyridoxal, pyridoxine, vitamin B6 |
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| pyridoxine | (noun) a B vitamin that is essential for metabolism of amino acids and starch | Synonyms: adermin, pyridoxal, pyridoxamine, vitamin B6 |
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| rhinosporidiosis | (noun) fungal infection of the nose; often acquired while swimming | - |
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| rid | (verb) relieve from | Synonyms: disembarrass, free |
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| riddance | (noun) the act of forcing out someone or something | Synonyms: ejection, exclusion, expulsion |
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| (noun) the act of removing or getting rid of something | Synonyms: elimination |
| riddle | (noun) a coarse sieve (as for gravel) | - |
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| (noun) a difficult problem | Synonyms: brain-teaser, conundrum, enigma |
| (verb) explain a riddle | - |
| (verb) set a difficult problem or riddle | - |
| (verb) speak in riddles | - |
| (verb) pierce with many holes | - |
| (verb) separate with a riddle, as grain from chaff | Synonyms: screen |
| (verb) spread or diffuse through | Synonyms: diffuse, imbue, interpenetrate, penetrate, permeate, pervade |
| riddled | (adjective) (often followed by `with') damaged throughout by numerous perforations or holes | - |
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| (adjective) spread throughout | - |
| ride | (noun) a journey in a vehicle (usually an automobile) | Synonyms: drive |
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| (noun) a mechanical device that you ride for amusement or excitement | - |
| (verb) harass with persistent criticism or carping | Synonyms: bait, cod, rag, rally, razz, tantalise, tantalize, taunt, tease, twit |
| (verb) keep partially engaged by slightly depressing a pedal with the foot | - |
| (verb) copulate with | Synonyms: mount |
| (verb) be carried or travel on or in a vehicle | - |
| (verb) sit and travel on the back of animal, usually while controlling its motions | Synonyms: sit |
| (verb) move like a floating object | - |
| (verb) climb up on the body | - |
| (verb) sit on and control a vehicle | - |
| (verb) ride over, along, or through | - |
| (verb) continue undisturbed and without interference | - |
| (verb) lie moored or anchored | - |
| (verb) have certain properties when driven | Synonyms: drive |
| (verb) be sustained or supported or borne | - |
| (verb) be contingent on | Synonyms: depend on, depend upon, devolve on, hinge on, hinge upon, turn on |
| rider | (noun) a clause that is appended to a legislative bill | - |
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| (noun) a traveler who actively rides an animal (as a horse or camel) | - |
| (noun) a traveler riding in a vehicle (a boat or bus or car or plane or train etc) who is not operating it | Synonyms: passenger |
| (noun) a traveler who actively rides a vehicle (as a bicycle or motorcycle) | - |
| ridge | (noun) a beam laid along the edge where two sloping sides of a roof meet at the top; provides an attachment for the upper ends of rafters | Synonyms: ridgepole, rooftree |
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| (noun) any long raised border or margin of a bone or tooth or membrane | - |
| (noun) a long narrow natural elevation or striation | - |
| (noun) a long narrow range of hills | Synonyms: ridgeline |
| (noun) a long narrow natural elevation on the floor of the ocean | - |
| (noun) any long raised strip | - |
| (verb) form into a ridge | - |
| (verb) spade into alternate ridges and troughs | - |
| (verb) throw soil toward (a crop row) from both sides | - |
| (verb) plough alternate strips by throwing the furrow onto an unploughed strip | - |
| (verb) extend in ridges | - |
| ridged | (adjective) having a ridge or shaped like a ridge or suggesting the keel of a ship | Synonyms: carinate, carinated, keeled |
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| ridgel | (noun) a colt with undescended testicles | Synonyms: ridgeling, ridgil, ridgling |
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| ridgeline | (noun) a long narrow range of hills | Synonyms: ridge |
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| ridgeling | (noun) a colt with undescended testicles | Synonyms: ridgel, ridgil, ridgling |
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| ridgepole | (noun) a beam laid along the edge where two sloping sides of a roof meet at the top; provides an attachment for the upper ends of rafters | Synonyms: ridge, rooftree |
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| ridgil | (noun) a colt with undescended testicles | Synonyms: ridgel, ridgeling, ridgling |
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| ridgling | (noun) a colt with undescended testicles | Synonyms: ridgel, ridgeling, ridgil |
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| ridicule | (noun) the act of deriding or treating with contempt | Synonyms: derision |
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| (noun) language or behavior intended to mock or humiliate | - |
| (verb) subject to laughter or ridicule | Synonyms: blackguard, guy, jest at, laugh at, make fun, poke fun, rib, roast |
| ridiculer | (noun) a humorist who uses ridicule and irony and sarcasm | Synonyms: ironist, satirist |
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| ridiculous | (adjective) so unreasonable as to invite derision | Synonyms: absurd, cockeyed, derisory, idiotic, laughable, ludicrous, nonsensical, preposterous |
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| (adjective) broadly or extravagantly humorous; resembling farce | Synonyms: farcical, ludicrous |
| (adjective) inspiring scornful pity | Synonyms: pathetic, silly |
| ridiculously | (adverb) so as to arouse or deserve laughter | Synonyms: laughably, ludicrously, preposterously |
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| ridiculousness | (noun) a message whose content is at variance with reason | Synonyms: absurdity, absurdness |
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| riding | (noun) travel by being carried on horseback | Synonyms: horseback riding |
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| (noun) the sport of sitting on the back of a horse while controlling its movements | Synonyms: equitation, horseback riding |
| ridley | (noun) a marine turtle | - |
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| roridula | (noun) either of 2 species of the genus Roridula; South African viscid perennial low-growing woody shrubs | - |
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| roughrider | (noun) a horseman skilled at breaking wild horses to the saddle | - |
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| saccharide | (noun) an essential structural component of living cells and source of energy for animals; includes simple sugars with small molecules as well as macromolecular substances; are classified according to the number of monosaccharide groups they contain | Synonyms: carbohydrate, sugar |
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| sarcosporidian | (noun) parasite of the muscles of vertebrates | Synonyms: sarcocystidean, sarcocystieian |
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