| antemortem | (adjective) preceding death | - |
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| antenatal | (adjective) occurring or existing before birth | Synonyms: antepartum, prenatal |
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| antenna | (noun) one of a pair of mobile appendages on the head of e.g. insects and crustaceans; typically sensitive to touch and taste | Synonyms: feeler |
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| (noun) an electrical device that sends or receives radio or television signals | Synonyms: aerial, transmitting aerial |
| (noun) sensitivity similar to that of a receptor organ | Synonyms: feeler |
| antennal | (adjective) of or relating to antennae | Synonyms: antennary |
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| antennary | (adjective) of or relating to antennae | Synonyms: antennal |
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| antenuptial | (adjective) relating to events before a marriage | Synonyms: premarital, prenuptial |
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| antepartum | (adjective) occurring or existing before birth | Synonyms: antenatal, prenatal |
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| antepenult | (noun) the 3rd syllable of a word counting back from the end | Synonyms: antepenultima, antepenultimate |
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| antepenultima | (noun) the 3rd syllable of a word counting back from the end | Synonyms: antepenult, antepenultimate |
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| antepenultimate | (adjective) third from last | - |
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| (noun) the 3rd syllable of a word counting back from the end | Synonyms: antepenult, antepenultima |
| anterior | (adjective) of or near the head end or toward the front plane of a body | - |
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| (adjective) earlier in time | Synonyms: prior |
| (noun) a tooth situated at the front of the mouth | Synonyms: front tooth |
| anteriority | (noun) the quality of being in front or (in lower animals) toward the head | - |
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| (noun) preceding in time | Synonyms: antecedence, antecedency, precedence, precedency, priority |
| anteriorly | (adverb) in an anterior direction | - |
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| anterograde | (adjective) of amnesia; affecting time immediately following trauma | - |
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| anteroom | (noun) a large entrance or reception room or area | Synonyms: antechamber, entrance hall, foyer, hall, lobby, vestibule |
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| anthophyllite | (noun) a dark brown mineral of the amphibole group; magnesium iron silicate | - |
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| anthracite | (noun) a hard natural coal that burns slowly and gives intense heat | Synonyms: anthracite coal, hard coal |
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| anthropophagite | (noun) a person who eats human flesh | Synonyms: anthropophagus, cannibal, man-eater |
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| antibacterial | (adjective) destroying bacteria or inhibiting their growth | - |
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| (noun) any drug that destroys bacteria or inhibits their growth | Synonyms: antibacterial drug, bactericide |
| anticholinesterase | (noun) a medicine that inhibits cholinesterase by combining with it and so has a cholinergic effect | - |
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| anticipate | (verb) be a forerunner of or occur earlier than | - |
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| (verb) regard something as probable or likely | Synonyms: expect |
| (verb) realize beforehand | Synonyms: foreknow, foresee, previse |
| (verb) make a prediction about; tell in advance | Synonyms: call, forebode, foretell, predict, prognosticate, promise |
| (verb) be excited or anxious about | Synonyms: look for, look to |
| (verb) act in advance of; deal with ahead of time | Synonyms: counter, foresee, forestall |
| anticipated | (adjective) expected hopefully | Synonyms: awaited, hoped-for |
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| antidote | (noun) a remedy that stops or controls the effects of a poison | Synonyms: counterpoison |
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| antihypertensive | (noun) a drug that reduces high blood pressure | Synonyms: antihypertensive drug |
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| antimatter | (noun) matter consisting of elementary particles that are the antiparticles of those making up normal substances | - |
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| antimetabolite | (noun) an antineoplastic drug that inhibits the utilization of a metabolite | - |
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| antiquate | (verb) give an antique appearance to | Synonyms: antique |
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| (verb) make obsolete or old-fashioned | - |
| antiquated | (adjective) so extremely old as seeming to belong to an earlier period | Synonyms: antediluvian, archaic |
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| antiquatedness | (noun) The state or quality of being outmoded or discredited by reason of age, of being out of style or fashion. | - |
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| antisatellite | (adjective) of or relating to a system to destroy satellites in orbit | Synonyms: ASAT |
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| apatite | (noun) a common complex mineral consisting of calcium fluoride phosphate or calcium chloride phosphate; a source of phosphorus | - |
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| aphanite | (noun) fine-grained homogeneous rock (such as basalt) containing minerals undetectable by the naked eye | - |
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| apiculate | (adjective) (of a leaf shape) having a short sharply pointed tip | - |
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| aplite | (noun) light-colored and fine-grained granitic rock consisting chiefly of quartz and feldspars | - |
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| apostate | (adjective) not faithful to religion or party or cause | - |
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| (noun) a disloyal person who betrays or deserts his cause or religion or political party or friend etc. | Synonyms: deserter, ratter, recreant, renegade, turncoat |
| appellate | (adjective) of or relating to or taking account of appeals (usually legal appeals) | Synonyms: appellant |
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| appetence | (noun) a feeling of craving something | Synonyms: appetency, appetite |
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| appetency | (noun) a feeling of craving something | Synonyms: appetence, appetite |
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| appetent | (adjective) marked by eager desire | - |
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| appetite | (noun) a feeling of craving something | Synonyms: appetence, appetency |
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| appointed | (adjective) subject to appointment | Synonyms: appointive |
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| (adjective) selected for a job | - |
| (adjective) provided with furnishing and accessories (especially of a tasteful kind) | - |
| (adjective) fixed or established especially by order or command | Synonyms: decreed, ordained, prescribed |
| appointee | (noun) an official who is appointed | - |
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| (noun) a person who is appointed to a job or position | Synonyms: appointment |
| apposite | (adjective) being of striking appropriateness and pertinence | Synonyms: apt, pertinent |
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| appositeness | (noun) appropriateness for the occasion | Synonyms: aptness |
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| appreciate | (verb) gain in value | Synonyms: apprise, apprize, revalue |
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| (verb) increase the value of | Synonyms: apprise, apprize |
| (verb) be fully aware of; realize fully | Synonyms: take account |
| (verb) recognize with gratitude; be grateful for | - |
| (verb) hold dear | Synonyms: prize, treasure, value |
| appreciated | (adjective) fully understood or grasped | Synonyms: apprehended, comprehended |
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| approbate | (verb) accept (documents) as valid | - |
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| (verb) approve or sanction officially | - |
| appropriate | (adjective) suitable for a particular person or place or condition etc | - |
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| (adjective) meant or adapted for an occasion or use | Synonyms: suitable, suited |
| (verb) give or assign a resource to a particular person or cause | Synonyms: allow, earmark, reserve, set aside |
| (verb) take possession of by force, as after an invasion | Synonyms: capture, conquer, seize |
| appropriately | (adverb) in accordance with what is appropriate or suitable for the circumstances | Synonyms: befittingly, duly, fitly, fittingly, properly, suitably |
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| appropriateness | (noun) the quality of being specially suitable | - |
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| (noun) appropriate conduct; doing the right thing | Synonyms: rightness |
| approximate | (adjective) located close together | Synonyms: close together |
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| (adjective) very close in resemblance | Synonyms: near |
| (adjective) not quite exact or correct | Synonyms: approximative, rough |
| (verb) judge tentatively or form an estimate of (quantities or time) | Synonyms: estimate, gauge, guess, judge |
| (verb) be close or similar | Synonyms: come close |
| approximately | (adverb) (of quantities) imprecise but fairly close to correct | Synonyms: about, around, close to, just about, more or less, or so, roughly, some |
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| appurtenance | (noun) a supplementary component that improves capability | Synonyms: accessory, add-on, supplement |
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| (noun) equipment consisting of miscellaneous articles needed for a particular operation or sport etc. | Synonyms: gear, paraphernalia |
| appurtenant | (adjective) furnishing added support | Synonyms: accessory, adjunct, adjuvant, ancillary, auxiliary |
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| apteral | (adjective) having columns at one or both ends but not along the sides | - |
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| (adjective) (of insects) without wings | Synonyms: apterous |
| apterous | (adjective) (of insects) without wings | Synonyms: apteral |
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| apteryx | (noun) nocturnal flightless bird of New Zealand having a long neck and stout legs; only surviving representative of the order Apterygiformes | Synonyms: kiwi |
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| aragonite | (noun) a mineral form of crystalline calcium carbonate; dimorphic with calcite | - |
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| arbiter | (noun) someone chosen to judge and decide a disputed issue | Synonyms: arbitrator, umpire |
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| (noun) someone with the power to settle matters at will | Synonyms: supreme authority |
| arbitrate | (verb) act between parties with a view to reconciling differences | Synonyms: intercede, intermediate, liaise, mediate |
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| archaebacteria | (noun) considered ancient life forms that evolved separately from bacteria and blue-green algae | Synonyms: archaebacterium, archaeobacteria, archeobacteria |
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| archaebacterium | (noun) considered ancient life forms that evolved separately from bacteria and blue-green algae | Synonyms: archaebacteria, archaeobacteria, archeobacteria |
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| archaeobacteria | (noun) considered ancient life forms that evolved separately from bacteria and blue-green algae | Synonyms: archaebacteria, archaebacterium, archeobacteria |
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| archaeopteryx | (noun) extinct primitive toothed bird of the Jurassic period having a long feathered tail and hollow bones; usually considered the most primitive of all birds | Synonyms: Archaeopteryx lithographica, archeopteryx |
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| archegoniate | (adjective) of or relating to an archegonium | Synonyms: archegonial |
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| archenteron | (noun) central cavity of the gastrula; becomes the intestinal or digestive cavity | - |
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| archeobacteria | (noun) considered ancient life forms that evolved separately from bacteria and blue-green algae | Synonyms: archaebacteria, archaebacterium, archaeobacteria |
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| archeopteryx | (noun) extinct primitive toothed bird of the Jurassic period having a long feathered tail and hollow bones; usually considered the most primitive of all birds | Synonyms: archaeopteryx, Archaeopteryx lithographica |
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| archidiaconate | (noun) office or position of an archdeacon | - |
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| archimandrite | (noun) the superior of an abbey of monks | Synonyms: abbot |
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| architect | (noun) someone who creates plans to be used in making something (such as buildings) | Synonyms: designer |
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| architectonic | (adjective) of or pertaining to construction or architecture | Synonyms: tectonic |
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| architectonics | (noun) the science of architecture | Synonyms: tectonics |
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| architectural | (adjective) of or pertaining to the art and science of architecture | - |
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| architecturally | (adverb) with regard to architecture | - |
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| architecture | (noun) the profession of designing buildings and environments with consideration for their esthetic effect | - |
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| (noun) an architectural product or work | - |
| (noun) (computer science) the structure and organization of a computer's hardware or system software | Synonyms: computer architecture |
| (noun) the discipline dealing with the principles of design and construction and ornamentation of fine buildings | - |
| architeuthis | (noun) largest mollusk known about but never seen (to 60 feet long) | Synonyms: giant squid |
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| arcminute | (noun) a unit of angular distance equal to a 60th of a degree | Synonyms: minute, minute of arc |
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| arcuate | (adjective) forming or resembling an arch | Synonyms: arced, arched, arching, arciform, bowed |
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| areolate | (adjective) relating to or like or divided into areolae | Synonyms: areolar |
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| arete | (noun) a sharp narrow ridge found in rugged mountains | - |
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| argentite | (noun) a valuable silver ore consisting of silver sulfide (Ag2S) | - |
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| argillite | (noun) a sedimentary rock differing from shale in being bound by silica and from slate in having no slate cleavages | - |
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| argyrodite | (noun) a rare steel-grey mineral consisting of silver and germanium and sulfur | - |
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| arillate | (adjective) (of some seeds) having a fleshy and usually brightly colored cover | Synonyms: ariled |
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| arrester | (noun) a restraint that slows airplanes as they land on the flight deck of an aircraft carrier | Synonyms: arrester hook |
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| arriviste | (noun) a person who has suddenly risen to a higher economic status but has not gained social acceptance of others in that class | Synonyms: nouveau-riche, parvenu, upstart |
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| arrogate | (verb) seize and take control without authority and possibly with force; take as one's right or possession | Synonyms: assume, seize, take over, usurp |
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| (verb) make undue claims to having | Synonyms: assign |
| (verb) demand as being one's due or property; assert one's right or title to | Synonyms: claim, lay claim |
| arsenate | (noun) a salt or ester of arsenic acid | - |
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| arsenopyrite | (noun) a silver-white or grey ore of arsenic | Synonyms: mispickel |
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| artefact | (noun) a man-made object taken as a whole | Synonyms: artifact |
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| artefactual | (adjective) of or relating to artifacts | Synonyms: artifactual |
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| artemisia | (noun) any of various composite shrubs or herbs of the genus Artemisia having aromatic green or greyish foliage | - |
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| arteria | (noun) a blood vessel that carries blood from the heart to the body | Synonyms: arterial blood vessel, artery |
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| arterial | (adjective) of or involving or contained in the arteries | - |
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| arterialise | (verb) change venous blood into arterial blood | Synonyms: arterialize |
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| arterialize | (verb) change venous blood into arterial blood | Synonyms: arterialise |
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| arteriectasia | (noun) an abnormal distension of an artery | Synonyms: arteriectasis |
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| arteriectasis | (noun) an abnormal distension of an artery | Synonyms: arteriectasia |
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| arteriogram | (noun) an X ray of an artery filled with a contrast medium | - |
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