| accroides | (noun) an alcohol-soluble resin from Australian trees; used in varnishes and in manufacturing paper | Synonyms: acaroid resin, accaroid resin, accroides gum, accroides resin, gum accroides |
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| acroanaesthesia | (noun) loss of sensation in the extremities | Synonyms: acroanesthesia |
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| acroanesthesia | (noun) loss of sensation in the extremities | Synonyms: acroanaesthesia |
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| acrobat | (noun) an athlete who performs acts requiring skill and agility and coordination | - |
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| acrobatics | (noun) the gymnastic moves of an acrobat | Synonyms: tumbling |
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| (noun) the performance of stunts while in flight in an aircraft | Synonyms: aerobatics, stunt flying, stunting |
| acrocarp | (noun) a moss in which the main axis is terminated by the archegonium (and hence the capsule) | Synonyms: acrocarpous moss |
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| acrocephaly | (noun) a congenital abnormality of the skull; the top of the skull assumes a cone shape | Synonyms: oxycephaly |
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| acrocyanosis | (noun) cyanosis of the extremities; can occur when a spasm of the blood vessels is caused by exposure to cold or by strong emotion | Synonyms: Raynaud's sign |
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| acrodont | (noun) an animal having teeth consolidated with the summit of the alveolar ridge without sockets | - |
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| acrogen | (noun) any flowerless plant such as a fern (pteridophyte) or moss (bryophyte) in which growth occurs only at the tip of the main stem | - |
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| acrolein | (noun) a pungent colorless unsaturated liquid aldehyde made from propene | Synonyms: propenal |
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| acromegalia | (noun) enlargement of bones of hands and feet and face; often accompanied by headache and muscle pain and emotional disturbances; caused by overproduction of growth hormone by the anterior pituitary gland (due to a tumor) | Synonyms: acromegaly |
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| acromegaly | (noun) enlargement of bones of hands and feet and face; often accompanied by headache and muscle pain and emotional disturbances; caused by overproduction of growth hormone by the anterior pituitary gland (due to a tumor) | Synonyms: acromegalia |
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| acromicria | (noun) abnormally small extremities (underdeveloped fingers and toes) | Synonyms: acromikria |
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| acromikria | (noun) abnormally small extremities (underdeveloped fingers and toes) | Synonyms: acromicria |
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| acromion | (noun) the outermost point of the spine of the shoulder blade | Synonyms: acromial process |
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| acromphalus | (noun) abnormal protrusion of the navel; sometimes the start of umbilical hernia | - |
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| acromyotonia | (noun) myotonia of the extremities only; causes spastic deformity of the hand or foot | - |
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| acronym | (noun) a word formed from the initial letters of the several words in the name and pronounced as one word | Synonyms: initialism |
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| acrophobia | (noun) a morbid fear of great heights | - |
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| acrophony | (noun) naming a letter of the alphabet by using a word whose initial sound is the sound represented by that letter | - |
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| acropolis | (noun) the citadel in ancient Greek towns | - |
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| acrosome | (noun) a process at the anterior end of a sperm cell that produces enzymes to facilitate penetration of the egg | - |
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| acrostic | (noun) a puzzle where you fill a square grid with words reading the same down as across | Synonyms: word square |
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| (noun) verse in which certain letters such as the first in each line form a word or message | - |
| antimicrobial | (noun) an agent (as heat or radiation or a chemical) that destroys microorganisms that might carry disease | Synonyms: antimicrobic, disinfectant, germicide |
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| antimicrobic | (noun) an agent (as heat or radiation or a chemical) that destroys microorganisms that might carry disease | Synonyms: antimicrobial, disinfectant, germicide |
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| cancroid | (noun) the most common form of skin cancer | Synonyms: squamous cell carcinoma |
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| cecropia | (noun) North American silkworm moth; larvae feed on the leaves of forest trees | Synonyms: cecropia moth, Hyalophora cecropia |
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| chancroid | (noun) infectious venereal ulcer | - |
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| chylomicron | (noun) a microscopic particle of triglycerides produced in the intestines during digestion; in the bloodstream they release their fatty acids into the blood | - |
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| cockcrow | (noun) the first light of day | Synonyms: aurora, break of day, break of the day, dawn, dawning, daybreak, dayspring, first light, morning, sunrise, sunup |
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| colicroot | (noun) any of several perennials of the genus Aletris having grasslike leaves and bitter roots reputed to cure colic | Synonyms: colic root, crow corn, star grass, unicorn root |
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| crisscross | (noun) a marking that consists of lines that cross each other | Synonyms: cross, mark |
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| croak | (noun) a harsh hoarse utterance (as of a frog) | Synonyms: croaking |
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| croaker | (noun) any of several fishes that make a croaking noise | - |
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| (noun) the lean flesh of a saltwater fish caught along Atlantic coast of southern U.S. | - |
| croaking | (noun) a harsh hoarse utterance (as of a frog) | Synonyms: croak |
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| crochet | (noun) needlework done by interlocking looped stitches with a hooked needle | Synonyms: crocheting |
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| crocheting | (noun) creating a garment of needlework | - |
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| (noun) needlework done by interlocking looped stitches with a hooked needle | Synonyms: crochet |
| crock | (noun) an earthen jar (made of baked clay) | Synonyms: earthenware jar |
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| (noun) nonsense; foolish talk | - |
| (noun) a black colloidal substance consisting wholly or principally of amorphous carbon and used to make pigments and ink | Synonyms: carbon black, lampblack, smut, soot |
| crockery | (noun) tableware (eating and serving dishes) collectively | Synonyms: dishware |
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| crocket | (noun) an architectural ornament of curved foliage used at the edge of a spire or gable | - |
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| crocodile | (noun) large voracious aquatic reptile having a long snout with massive jaws and sharp teeth and a body covered with bony plates; of sluggish tropical waters | - |
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| crocodilian | (noun) extant archosaurian reptile | Synonyms: crocodilian reptile |
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| crocolite | (noun) a rare lead chromite mineral that forms bright orange crystals | - |
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| crocus | (noun) any of numerous low-growing plants of the genus Crocus having slender grasslike leaves and white or yellow or purple flowers; native chiefly to the Mediterranean region but widely cultivated | - |
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| croft | (noun) a small farm worked by a crofter | - |
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| crofter | (noun) an owner or tenant of a small farm in Great Britain | - |
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| croissant | (noun) very rich flaky crescent-shaped roll | Synonyms: crescent roll |
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| cromlech | (noun) a prehistoric megalithic tomb typically having two large upright stones and a capstone | Synonyms: dolmen, portal tomb |
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| cromorne | (noun) a Renaissance woodwind with a double reed and a curving tube (crooked horn) | Synonyms: crumhorn, krummhorn |
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| crone | (noun) an ugly evil-looking old woman | Synonyms: beldam, beldame, hag, witch |
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| crony | (noun) a close friend who accompanies his buddies in their activities | Synonyms: brother, buddy, chum, pal, sidekick |
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| cronyism | (noun) favoritism shown to friends and associates (as by appointing them to positions without regard for their qualifications) | - |
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| crook | (noun) a long staff with one end being hook shaped | Synonyms: shepherd's crook |
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| (noun) someone who has committed a crime or has been legally convicted of a crime | Synonyms: criminal, felon, malefactor, outlaw |
| (noun) a circular segment of a curve | Synonyms: bend, turn, twist |
| crookback | (noun) a person whose back is hunched because of abnormal curvature of the upper spine | Synonyms: humpback, hunchback |
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| crookedness | (noun) having or distinguished by crooks or curves or bends or angles | - |
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| (noun) the quality of being deceitful and underhanded | Synonyms: deviousness |
| (noun) a tortuous and twisted shape or position | Synonyms: contortion, torsion, tortuosity, tortuousness |
| crookneck | (noun) yellow squash with a thin curved neck and somewhat warty skin | Synonyms: crookneck squash, summer crookneck |
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| crooner | (noun) a singer of popular ballads | Synonyms: balladeer |
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| crooning | (noun) the act of singing popular songs in a sentimental manner | - |
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| (noun) singing in a soft low tone | - |
| crop | (noun) a pouch in many birds and some lower animals that resembles a stomach for storage and preliminary maceration of food | Synonyms: craw |
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| (noun) the stock or handle of a whip | - |
| (noun) the output of something in a season | - |
| (noun) a collection of people or things appearing together | - |
| (noun) the yield from plants in a single growing season | Synonyms: harvest |
| (noun) a cultivated plant that is grown commercially on a large scale | - |
| cropper | (noun) small farmers and tenants | Synonyms: sharecrop farmer, sharecropper |
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| croquet | (noun) a game in which players hit a wooden ball through a series of hoops; the winner is the first to traverse all the hoops and hit a peg | - |
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| croquette | (noun) minced cooked meats (or vegetables) in thick white sauce; breaded and deep-fried | - |
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| crore | (noun) the number that is represented as a one followed by 7 zeros; ten million | - |
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| crosier | (noun) a staff surmounted by a crook or cross carried by bishops as a symbol of pastoral office | Synonyms: crozier |
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| cross | (noun) (genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybrids | Synonyms: crossbreeding, crossing, hybridisation, hybridization, hybridizing, interbreeding |
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| (noun) (genetics) an organism that is the offspring of genetically dissimilar parents or stock; especially offspring produced by breeding plants or animals of different varieties or breeds or species | Synonyms: crossbreed, hybrid |
| (noun) a wooden structure consisting of an upright post with a transverse piece | - |
| (noun) a marking that consists of lines that cross each other | Synonyms: crisscross, mark |
| (noun) any affliction that causes great suffering | Synonyms: crown of thorns |
| crossbar | (noun) long thin horizontal crosspiece between two vertical posts | - |
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| (noun) game equipment consisting of a horizontal bar to be jumped or vaulted over | - |
| (noun) a horizontal bar that goes across something | - |
| crossbeam | (noun) a horizontal beam that extends across something | Synonyms: crosspiece, trave, traverse |
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| crossbench | (noun) any of the seats in the House of Commons used by members who do not vote regularly with either the government or the Opposition | - |
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| crossbencher | (noun) a member of the House of Commons who does not vote regularly with either the government or the Opposition | - |
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| crossbill | (noun) finch with a bill whose tips cross when closed | Synonyms: Loxia curvirostra |
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| crossbones | (noun) two crossed bones (or a representation of two crossed bones) used as a symbol danger or death | - |
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| crossbow | (noun) a bow fixed transversely on a wooden stock grooved to direct the arrow (quarrel) | - |
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| crossbreed | (noun) (genetics) an organism that is the offspring of genetically dissimilar parents or stock; especially offspring produced by breeding plants or animals of different varieties or breeds or species | Synonyms: cross, hybrid |
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| crossbreeding | (noun) (genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybrids | Synonyms: cross, crossing, hybridisation, hybridization, hybridizing, interbreeding |
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| (noun) reproduction by parents of different races (especially by white and non-white persons) | Synonyms: interbreeding, miscegenation |
| crosscheck | (noun) an illegal check (chopping at an opponent's arms or stick) | - |
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| (noun) an instance of confirming something by considering information from several sources | - |
| crosscurrent | (noun) actions counter to the main group activity | Synonyms: countercurrent |
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| (noun) a stretch of turbulent water in a river or the sea caused by one current flowing into or across another current | Synonyms: countercurrent, rip, riptide, tide rip |
| crosscut | (noun) a route shorter than the usual one | Synonyms: cutoff, shortcut |
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| (noun) a diagonal path | - |
| crosse | (noun) a long racket with a triangular frame; used in playing lacrosse | - |
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| crossfire | (noun) fire from two or more points so that the lines of fire cross | - |
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| (noun) a lively or heated interchange of ideas and opinions | - |
| crosshairs | (noun) a center of interest | - |
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| crosshatch | (noun) shading consisting of multiple crossing lines | Synonyms: hachure, hatch, hatching |
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| crosshead | (noun) metal block that connects to a piston; it slides on parallel guides and moves a connecting rod back and forth | - |
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| (noun) a heading of a subsection printed within the body of the text | Synonyms: crossheading |
| crossheading | (noun) a heading of a subsection printed within the body of the text | Synonyms: crosshead |
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| crossing | (noun) a voyage across a body of water (usually across the Atlantic Ocean) | - |
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| (noun) traveling across | - |
| (noun) (genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybrids | Synonyms: cross, crossbreeding, hybridisation, hybridization, hybridizing, interbreeding |
| (noun) a path (often marked) where something (as a street or railroad) can be crossed to get from one side to the other | Synonyms: crossover, crosswalk |
| (noun) a junction where one street or road crosses another | Synonyms: carrefour, crossroad, crossway, intersection |
| (noun) a point where two lines (paths or arcs etc.) intersect | - |
| (noun) a shallow area in a stream that can be forded | Synonyms: ford |
| crossjack | (noun) the lowermost sail on a mizzenmast | Synonyms: mizzen course |
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| crossness | (noun) a disposition to be ill-tempered | Synonyms: crabbedness, crabbiness |
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| (noun) an irritable petulant feeling | Synonyms: choler, fretfulness, fussiness, irritability, peevishness, petulance |
| crossopterygian | (noun) any fish of the order Crossopterygii; most known only in fossil form | Synonyms: lobe-finned fish, lobefin |
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| crossover | (noun) a path (often marked) where something (as a street or railroad) can be crossed to get from one side to the other | Synonyms: crossing, crosswalk |
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| (noun) the appropriation of a new style (especially in popular music) by combining elements of different genres in order to appeal to a wider audience | - |
| (noun) a voter who is registered as a member of one political party but who votes in the primary of another party | Synonyms: crossover voter |
| (noun) the interchange of sections between pairing homologous chromosomes during the prophase of meiosis | Synonyms: crossing over |
| crosspatch | (noun) a bad-tempered person | Synonyms: churl, crank, grouch, grump |
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| crosspiece | (noun) a transverse brace | - |
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| (noun) a horizontal beam that extends across something | Synonyms: crossbeam, trave, traverse |
| crossroad | (noun) a junction where one street or road crosses another | Synonyms: carrefour, crossing, crossway, intersection |
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| crossroads | (noun) a point where a choice must be made | - |
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| (noun) a community of people smaller than a village | Synonyms: hamlet |
| (noun) a crisis situation or point in time when a critical decision must be made | Synonyms: critical point, juncture |
| crosstalk | (noun) the presence of an unwanted signal via an accidental coupling | Synonyms: XT |
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| crosstie | (noun) one of the cross braces that support the rails on a railway track | Synonyms: railroad tie, sleeper, tie |
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| crosswalk | (noun) a path (often marked) where something (as a street or railroad) can be crossed to get from one side to the other | Synonyms: crossing, crossover |
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| crossway | (noun) a junction where one street or road crosses another | Synonyms: carrefour, crossing, crossroad, intersection |
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| crosswind | (noun) wind blowing across the path of a ship or aircraft | - |
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| crossword | (noun) a puzzle in which words corresponding to numbered clues are to be found and written in to squares in the puzzle | Synonyms: crossword puzzle |
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| crotal | (noun) any of several lichens of the genus Parmelia from which reddish brown or purple dyes are made | Synonyms: crottal, crottle |
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