| autoecious | (adjective) of parasites especially rust fungi; completing the entire life cycle on a single host | Synonyms: homoecious |
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| autoinjector | (noun) a hypodermic syringe to use in injecting yourself with a liquid | - |
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| barbecue | (noun) a rack to hold meat for cooking over hot charcoal usually out of doors | Synonyms: barbeque |
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| (noun) a cookout in which food is cooked over an open fire; especially a whole animal carcass roasted on a spit | Synonyms: barbeque |
| (noun) meat that has been barbecued or grilled in a highly seasoned sauce | Synonyms: barbeque |
| (verb) cook outdoors on a barbecue grill | Synonyms: barbeque, cook out |
| barbecued | (adjective) cooked over an outdoor grill | Synonyms: grilled |
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| barbecuing | (noun) roasting a large piece of meat on a revolving spit out of doors over an open fire | - |
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| baroreceptor | (noun) a sensory receptor that responds to pressure | - |
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| becalm | (verb) make steady | Synonyms: calm, steady |
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| becalmed | (adjective) rendered motionless for lack of wind | - |
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| bechamel | (noun) milk thickened with a butter and flour roux | Synonyms: bechamel sauce, white sauce |
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| bechance | (verb) happen, occur, or be the case in the course of events or by chance | Synonyms: befall, happen |
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| (verb) become of; happen to | Synonyms: befall, betide |
| becharm | (verb) attract; cause to be enamored | Synonyms: beguile, bewitch, captivate, capture, catch, charm, enamor, enamour, enchant, entrance, fascinate, trance |
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| (verb) control by magic spells, as by practicing witchcraft | Synonyms: charm |
| beck | (noun) a beckoning gesture | - |
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| becket | (noun) (nautical) a short line with an eye at one end and a knot at the other; used to secure loose items on a ship | - |
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| beckon | (verb) signal with the hands or nod | Synonyms: wave |
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| (verb) summon with a wave, nod, or some other gesture | - |
| (verb) appear inviting | - |
| becloud | (verb) make less visible or unclear | Synonyms: befog, cloud, fog, haze over, mist, obnubilate, obscure |
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| become | (verb) enter or assume a certain state or condition | Synonyms: get, go |
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| (verb) come into existence | - |
| (verb) undergo a change or development | Synonyms: turn |
| (verb) enhance the appearance of | Synonyms: suit |
| becoming | (adjective) displaying or setting off to best advantage | - |
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| (adjective) according with custom or propriety | Synonyms: comely, comme il faut, decorous, seemly |
| becomingly | (adverb) in a becoming manner | - |
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| becomingness | (noun) the quality of being becoming | - |
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| bedeck | (verb) decorate | Synonyms: bedight, deck |
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| beech | (noun) any of several large deciduous trees with rounded spreading crowns and smooth grey bark and small sweet edible triangular nuts enclosed in burs; north temperate regions | Synonyms: beech tree |
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| (noun) wood of any of various beech trees; used for flooring and containers and plywood and tool handles | Synonyms: beechwood |
| beechen | (adjective) consisting of or made of wood of the beech tree | - |
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| beechnut | (noun) small sweet triangular nut of any of various beech trees | - |
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| beechwood | (noun) wood of any of various beech trees; used for flooring and containers and plywood and tool handles | Synonyms: beech |
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| beseech | (verb) ask for or request earnestly | Synonyms: adjure, bid, conjure, entreat, press |
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| beseeching | (adjective) begging | Synonyms: imploring, pleading |
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| beseechingly | (adverb) in a beseeching manner | Synonyms: entreatingly, imploringly, importunately, pleadingly |
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| beseechingness | (noun) The state or quality of one who begs or implores. | - |
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| bespeckle | (verb) mark with small spots | Synonyms: speckle |
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| bespectacled | (adjective) wearing, or having the face adorned with, eyeglasses or an eyeglass | Synonyms: monocled, spectacled |
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| bibliothec | (noun) a professional person trained in library science and engaged in library services | Synonyms: librarian |
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| bibliotheca | (noun) a collection of books | - |
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| bibliothecal | (adjective) of or relating to a library or bibliotheca or a librarian | Synonyms: bibliothecarial |
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| bibliothecarial | (adjective) of or relating to a library or bibliotheca or a librarian | Synonyms: bibliothecal |
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| bidirectional | (adjective) reactive or functioning or allowing movement in two usually opposite directions | - |
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| bimolecular | (adjective) relating to or affecting two molecules | - |
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| bioelectricity | (noun) electric phenomena in animals or plants | - |
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| biotech | (noun) the branch of molecular biology that studies the use of microorganisms to perform specific industrial processes | Synonyms: biotechnology |
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| biotechnology | (noun) the branch of engineering science in which biological science is used to study the relation between workers and their environments | Synonyms: bioengineering, ergonomics |
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| (noun) the branch of molecular biology that studies the use of microorganisms to perform specific industrial processes | Synonyms: biotech |
| bisect | (verb) cut in half or cut in two | - |
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| bisection | (noun) dividing into two equal parts | - |
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| bisectional | (adjective) of or relating to bisection | - |
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| bluecoat | (noun) a person dressed all in blue (as a soldier or sailor) | - |
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| borecole | (noun) a hardy cabbage with coarse curly leaves that do not form a head | Synonyms: Brassica oleracea acephala, cole, colewort, kail, kale |
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| bottlecap | (noun) a cap that seals a bottle | - |
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| bottleneck | (noun) the narrow part of a bottle near the top | - |
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| (noun) a narrowing that reduces the flow through a channel | Synonyms: chokepoint, constriction |
| (verb) become narrow, like a bottleneck | - |
| (verb) slow down or impede by creating an obstruction | - |
| breakneck | (adjective) moving at very high speed | - |
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| breccia | (noun) a rudaceous rock consisting of sharp fragments embedded in clay or sand | - |
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| brecciate | (verb) break into breccia | - |
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| (verb) form into breccia | - |
| breech | (noun) opening in the rear of the barrel of a gun where bullets can be loaded | Synonyms: rear of barrel, rear of tube |
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| breechblock | (noun) a metal block in breech-loading firearms that is withdrawn to insert a cartridge and replaced to close the breech before firing | Synonyms: breech closer |
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| breechcloth | (noun) a garment that provides covering for the loins | Synonyms: breechclout, loincloth |
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| breechclout | (noun) a garment that provides covering for the loins | Synonyms: breechcloth, loincloth |
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| breeched | (adjective) dressed in trousers | Synonyms: pantalooned, trousered |
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| breeches | (noun) (used in the plural) trousers ending above the knee | Synonyms: knee breeches, knee pants, knickerbockers, knickers |
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| breechloader | (noun) a gun that is loaded at the breech | - |
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| bridecake | (noun) a rich cake with two or more tiers and covered with frosting and decorations; served at a wedding reception | Synonyms: wedding cake |
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| bullnecked | (adjective) having a thick short powerful neck | - |
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| cachectic | (adjective) relating to or having the symptoms of cachexia | - |
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| caecal | (adjective) of or like a cecum | Synonyms: cecal |
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| caecilian | (adjective) of or relating to or belonging to the family Caeciliidae | - |
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| (noun) any of the small slender limbless burrowing wormlike amphibians of the order Gymnophiona; inhabit moist soil in tropical regions | Synonyms: blindworm |
| caecum | (noun) the cavity in which the large intestine begins and into which the ileum opens | Synonyms: blind gut, cecum |
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| caleche | (noun) the folding hood of a horse-drawn carriage | Synonyms: calash, calash top |
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| (noun) a woman's large folded hooped hood; worn in the 18th century | Synonyms: calash |
| callosectomy | (noun) severing the corpus callosum so that communication between the cerebral hemispheres is interrupted (in cases of severe intractable epilepsy) | Synonyms: callosotomy |
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| canecutter | (noun) a wood rabbit of southeastern United States swamps and lowlands | Synonyms: swamp hare, swamp rabbit, Sylvilagus aquaticus |
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| catalectic | (adjective) (verse) metrically incomplete; especially lacking one or more syllables in the final metrical foot | - |
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| (noun) (prosody) a line of verse that lacks a syllable in the last metrical foot | - |
| catechesis | (noun) oral religious instruction (as before baptism or confirmation) | - |
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| catechetic | (adjective) of or relating to or resembling a rigorous catechism | Synonyms: catechistic |
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| (adjective) of or relating to or involving catechesis | Synonyms: catechetical |
| catechetical | (adjective) of or relating to or involving catechesis | Synonyms: catechetic |
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| catechin | (noun) a tannic acid that is extracted from black catechu as a white crystalline substance | - |
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| catechise | (verb) examine through questioning and answering | Synonyms: catechize |
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| (verb) give religious instructions to | Synonyms: catechize |
| catechism | (noun) an elementary book summarizing the principles of a Christian religion; written as questions and answers | - |
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| (noun) a series of questions put to an individual (such as a political candidate) to elicit their views | - |
| catechismal | (adjective) of or relating to a catechism summarizing the principles of Christianity | - |
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| catechist | (noun) one who instructs catechumens in preparation for baptism (especially one using a catechism) | - |
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| catechistic | (adjective) of or relating to or resembling a rigorous catechism | Synonyms: catechetic |
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| catechize | (verb) examine through questioning and answering | Synonyms: catechise |
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| (verb) give religious instructions to | Synonyms: catechise |
| catecholamine | (noun) any of a group of chemicals including epinephrine and norepinephrine that are produced in the medulla of the adrenal gland | - |
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| catechu | (noun) East Indian spiny tree having twice-pinnate leaves and yellow flowers followed by flat pods; source of black catechu | Synonyms: Acacia catechu, Jerusalem thorn |
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| (noun) extract of the heartwood of Acacia catechu used for dyeing and tanning and preserving fishnets and sails; formerly used medicinally | Synonyms: black catechu |
| catechumen | (noun) a new convert being taught the principles of Christianity by a catechist | Synonyms: neophyte |
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| cathect | (verb) inject with libidinal energy | - |
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| cathectic | (adjective) of or relating to cathexis | - |
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| cecal | (adjective) of or like a cecum | Synonyms: caecal |
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| cecity | (noun) the state of being blind or lacking sight | Synonyms: blindness, sightlessness |
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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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| cecum | (noun) the cavity in which the large intestine begins and into which the ileum opens | Synonyms: blind gut, caecum |
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| celecoxib | (noun) a Cox-2 inhibitor (trade name Celebrex) that relieves pain and inflammation without harming the digestive tract | Synonyms: Celebrex |
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| centerpiece | (noun) something placed at the center of something else (as on a table) | Synonyms: centrepiece |
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| (noun) the central or most important feature | Synonyms: centrepiece |
| centrepiece | (noun) something placed at the center of something else (as on a table) | Synonyms: centerpiece |
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| (noun) the central or most important feature | Synonyms: centerpiece |
| cerecloth | (noun) a waterproof waxed cloth once used as a shroud | - |
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| check | (noun) the act of restraining power or action or limiting excess | Synonyms: bridle, curb |
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| (noun) obstructing an opponent in ice hockey | - |
| (noun) (chess) a direct attack on an opponent's king | - |
| (noun) the act of inspecting or verifying | Synonyms: check-out procedure, checkout |
| (noun) a textile pattern of squares or crossed lines (resembling a checkerboard) | - |
| (noun) a mark left after a small piece has been chopped or broken off of something | Synonyms: chip |
| (noun) an appraisal of the state of affairs | Synonyms: assay |
| (noun) additional proof that something that was believed (some fact or hypothesis or theory) is correct | Synonyms: confirmation, substantiation, verification |
| (noun) something immaterial that interferes with or delays action or progress | Synonyms: balk, baulk, deterrent, handicap, hinderance, hindrance, impediment |
| (noun) the bill in a restaurant | Synonyms: chit, tab |
| (noun) a mark indicating that something has been noted or completed etc. | Synonyms: check mark, tick |
| (noun) a written order directing a bank to pay money | Synonyms: bank check, cheque |
| (noun) the state of inactivity following an interruption | Synonyms: arrest, halt, hitch, stay, stop, stoppage |
| (verb) slow the growth or development of | Synonyms: delay, retard |
| (verb) become fractured; break or crack on the surface only | Synonyms: break, crack |
| (verb) make cracks or chinks in | Synonyms: chink |
| (verb) arrest the motion (of something) abruptly | - |
| (verb) examine so as to determine accuracy, quality, or condition | Synonyms: check into, check out, check over, check up on, go over, look into, suss out |
| (verb) put a check mark on or near or next to | Synonyms: check off, mark, mark off, tick, tick off |
| (verb) be careful or certain to do something; make certain of something | Synonyms: ascertain, assure, control, ensure, insure, see, see to it |
| (verb) verify by consulting a source or authority | - |
| (verb) write out a check on a bank account | - |
| (verb) find out, learn, or determine with certainty, usually by making an inquiry or other effort | Synonyms: ascertain, determine, find out, learn, see, watch |
| (verb) place into check | - |
| (verb) decline to initiate betting | - |
| (verb) hold back, as of a danger or an enemy; check the expansion or influence of | Synonyms: arrest, contain, hold back, stop, turn back |
| (verb) mark into squares or draw squares on; draw crossed lines on | Synonyms: checker, chequer |
| (verb) stop in a chase especially when scent is lost | - |
| (verb) abandon the intended prey, turn, and pursue an inferior prey | - |
| (verb) stop for a moment, as if out of uncertainty or caution | - |
| (verb) hand over something to somebody as for temporary safekeeping | - |
| (verb) consign for shipment on a vehicle | - |
| (verb) develop (a child's or animal's) behavior by instruction and practice; especially to teach self-control | Synonyms: condition, discipline, train |
| (verb) make an examination or investigation | - |
| (verb) lessen the intensity of; temper; hold in restraint; hold or keep within limits | Synonyms: contain, control, curb, hold, hold in, moderate |
| (verb) block or impede (a player from the opposing team) in ice hockey | - |
| (verb) be compatible, similar or consistent; coincide in their characteristics | Synonyms: agree, correspond, fit, gibe, jibe, match, tally |
| (verb) be verified or confirmed; pass inspection | Synonyms: check out |
| checkbook | (noun) a book issued to holders of checking accounts | Synonyms: chequebook |
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| checked | (adjective) patterned with alternating squares of color | Synonyms: checkered, chequered |
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| checker | (noun) one of the flat round pieces used in playing the game of checkers | Synonyms: chequer |
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| (noun) one who checks the correctness of something | - |
| (noun) an attendant who checks coats or baggage | - |
| (verb) variegate with different colors, shades, or patterns | Synonyms: chequer |
| (verb) mark into squares or draw squares on; draw crossed lines on | Synonyms: check, chequer |
| checkerberry | (noun) spicy red berrylike fruit; source of wintergreen oil | Synonyms: boxberry, spiceberry, teaberry, wintergreen |
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| (noun) creeping shrub of eastern North America having white bell-shaped flowers followed by spicy red berrylike fruit and shiny aromatic leaves that yield wintergreen oil | Synonyms: creeping wintergreen, Gaultheria procumbens, ground-berry, groundberry, mountain tea, teaberry, wintergreen |
| checkerbloom | (noun) perennial purple-flowered wild mallow of western North America that is also cultivated | Synonyms: Sidalcea malviflora, wild hollyhock |
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| checkerboard | (noun) a board having 64 squares of two alternating colors | Synonyms: checker board, chequerboard |
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| checkered | (adjective) marked by changeable fortune | - |
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| (adjective) patterned with alternating squares of color | Synonyms: checked, chequered |
| checkers | (noun) a checkerboard game for two players who each have 12 pieces; the object is to jump over and so capture the opponent's pieces | Synonyms: draughts |
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| checklist | (noun) a list of items (names or tasks etc.) to be checked or consulted | - |
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| checkmate | (noun) a chess move constituting an inescapable and indefensible attack on the opponent's king | Synonyms: mate |
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| (noun) complete victory | - |
| (verb) place an opponent's king under an attack from which it cannot escape and thus ending the game | Synonyms: mate |