| accipitrine | (adjective) of or relating to or belonging to the genus Accipiter (or to typical hawks) | - |
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| acentric | (adjective) lacking a centromere | - |
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| (adjective) not centered or having no center | - |
| acidimetric | (adjective) involving or related to acidimetry | - |
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| acrocentric | (adjective) having a subterminal centromere | - |
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| acrylonitrile | (noun) a colorless liquid unsaturated nitrile made from propene | Synonyms: propenonitrile, vinyl cyanide |
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| actinometric | (adjective) of or related to actinometry | Synonyms: actinometrical |
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| actinometrical | (adjective) of or related to actinometry | Synonyms: actinometric |
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| administrivia | (noun) the tiresome but essential details that must be taken care of and tasks that must be performed in running an organization | - |
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| airstrip | (noun) an airfield without normal airport facilities | Synonyms: flight strip, landing strip, strip |
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| alabastrine | (adjective) of or resembling alabaster | Synonyms: alabaster |
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| alastrim | (noun) a mild form of smallpox caused by a less virulent form of the virus | Synonyms: Cuban itch, Kaffir pox, milk pox, pseudosmallpox, pseudovariola, variola minor, West Indian smallpox, white pox |
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| aldotriose | (noun) Any aldose having three carbon atoms; in reality, just glyceraldehyde. | - |
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| algometric | (adjective) of or related to algometry | Synonyms: algometrical |
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| algometrical | (adjective) of or related to algometry | Synonyms: algometric |
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| allometric | (adjective) relating to or marked by allometry | - |
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| allopatric | (adjective) (of biological species or speciation) occurring in areas isolated geographically from one another | - |
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| alpestrine | (adjective) growing at high altitudes | Synonyms: subalpine |
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| altricial | (adjective) (of hatchlings) naked and blind and dependent on parents for food | - |
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| ametria | (noun) congenital absence of the uterus | - |
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| amitriptyline | (noun) a tricyclic antidepressant drug (trade name Elavil) with serious side effects; interacts with many other medications | Synonyms: amitriptyline hydrochloride, Elavil |
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| amphitheatric | (adjective) of or related to an amphitheater | Synonyms: amphitheatrical |
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| amphitheatrical | (adjective) of or related to an amphitheater | Synonyms: amphitheatric |
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| anemometric | (adjective) pertaining to the measurement of wind speed and direction | Synonyms: anemometrical |
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| anemometrical | (adjective) pertaining to the measurement of wind speed and direction | Synonyms: anemometric |
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| anestric | (adjective) of or relating to anestrus | Synonyms: anestrous, anoestrous |
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| anisometric | (adjective) having unsymmetrical parts or unequal dimensions or measurements | Synonyms: unsymmetrical |
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| anthropocentric | (adjective) human-centered | - |
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| anthropocentricity | (noun) an inclination to evaluate reality exclusively in terms of human values | Synonyms: anthropocentrism |
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| anthropocentrism | (noun) an inclination to evaluate reality exclusively in terms of human values | Synonyms: anthropocentricity |
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| anthropometric | (adjective) of or relating to anthropometry | Synonyms: anthropometrical |
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| anthropometrical | (adjective) of or relating to anthropometry | Synonyms: anthropometric |
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| antineutrino | (noun) the antiparticle of a neutrino | - |
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| astride | (adverb) with one leg on each side | Synonyms: astraddle |
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| (adverb) with the legs stretched far apart | - |
| astringe | (verb) become constricted or compressed | - |
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| (verb) constrict or bind or draw together | - |
| astringence | (noun) a sharp astringent taste; the taste experience when a substance causes the mouth to pucker | Synonyms: astringency |
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| astringency | (noun) the ability to contract or draw together soft body tissues to check blood flow or restrict secretion of fluids | Synonyms: stypsis |
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| (noun) a sharp astringent taste; the taste experience when a substance causes the mouth to pucker | Synonyms: astringence |
| astringent | (adjective) tending to draw together or constrict soft organic tissue | - |
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| (adjective) sour or bitter in taste | Synonyms: acerb, acerbic |
| (noun) a drug that causes contraction of body tissues and canals | Synonyms: astringent drug, styptic |
| asymmetric | (adjective) characterized by asymmetry in the spatial arrangement or placement of parts or components | Synonyms: asymmetrical |
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| asymmetrical | (adjective) characterized by asymmetry in the spatial arrangement or placement of parts or components | Synonyms: asymmetric |
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| (adjective) irregular in shape or outline | Synonyms: crooked |
| asymmetrically | (adverb) in an asymmetrical manner | Synonyms: unsymmetrically |
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| atrial | (adjective) of or relating to a cavity or chamber in the body (especially one of the upper chambers of the heart) | - |
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| atrioventricular | (adjective) relating to or affecting the atria and ventricles of the heart | Synonyms: auriculoventricular |
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| atrip | (adjective) (of an anchor) just clear of the bottom | Synonyms: aweigh |
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| atrium | (noun) the central area in a building; open to the sky | - |
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| (noun) any chamber that is connected to other chambers or passageways (especially one of the two upper chambers of the heart) | - |
| attributable | (adjective) capable of being attributed | - |
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| attribute | (noun) an abstraction belonging to or characteristic of an entity | - |
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| (noun) a construct whereby objects or individuals can be distinguished | Synonyms: dimension, property |
| (verb) attribute or credit to | Synonyms: ascribe, assign, impute |
| (verb) decide as to where something belongs in a scheme | Synonyms: assign |
| attribution | (noun) assigning to a cause or source | Synonyms: ascription |
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| (noun) assigning some quality or character to a person or thing | Synonyms: ascription |
| attributive | (adjective) of adjectives; placed before the nouns they modify | Synonyms: prenominal |
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| attributively | (adverb) in an attributive manner | - |
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| attrited | (adjective) worn by rubbing or friction | - |
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| attrition | (noun) the act of rubbing together; wearing something down by friction | - |
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| (noun) a wearing down to weaken or destroy | - |
| (noun) sorrow for sin arising from fear of damnation | Synonyms: contriteness, contrition |
| (noun) the wearing down of rock particles by friction due to water or wind or ice | Synonyms: abrasion, detrition, grinding |
| (noun) erosion by friction | Synonyms: abrasion, corrasion, detrition |
| attritional | (adjective) relating to or caused by attrition | - |
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| audiometric | (adjective) of or relating to audiometry | - |
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| auriculoventricular | (adjective) relating to or affecting the atria and ventricles of the heart | Synonyms: atrioventricular |
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| aviatrix | (noun) a woman aviator | Synonyms: airwoman, aviatress |
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| awestricken | (adjective) having or showing a feeling of mixed reverence and respect and wonder and dread | Synonyms: awed, awestruck |
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| barometric | (adjective) relating to atmospheric pressure or indicated by a barometer | Synonyms: barometrical |
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| barometrical | (adjective) relating to atmospheric pressure or indicated by a barometer | Synonyms: barometric |
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| bathymetric | (adjective) of or relating to measurements of the depths of oceans or lakes | Synonyms: bathymetrical |
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| bathymetrical | (adjective) of or relating to measurements of the depths of oceans or lakes | Synonyms: bathymetric |
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| belletristic | (adjective) written and regarded for aesthetic value rather than content | - |
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| bestride | (verb) get up on the back of | Synonyms: climb on, get on, hop on, jump on, mount, mount up |
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| bicentric | (adjective) having two centers | - |
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| bimestrial | (adjective) two months long; lasting two months | - |
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| (adjective) occurring every two months | Synonyms: bimonthly |
| bioelectricity | (noun) electric phenomena in animals or plants | - |
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| biometrics | (noun) a branch of biology that studies biological phenomena and observations by means of statistical analysis | Synonyms: biometry, biostatistics |
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| bolometric | (adjective) of or relating to a bolometer | - |
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| bowstring | (noun) the string of an archer's bow | - |
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| calorimetric | (adjective) of or relating to the measurement of heat | - |
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| cartridge | (noun) ammunition consisting of a cylindrical casing containing an explosive charge and a bullet; fired from a rifle or handgun | - |
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| (noun) an electro-acoustic transducer that is the part of the arm of a record player that holds the needle and that is removable | Synonyms: pickup |
| (noun) a module designed to be inserted into a larger piece of equipment | - |
| (noun) a light-tight supply chamber holding the film and supplying it for exposure as required | Synonyms: magazine |
| catoptric | (adjective) of or relating to catoptrics; produced by or based on mirrors | Synonyms: catoptrical |
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| catoptrical | (adjective) of or relating to catoptrics; produced by or based on mirrors | Synonyms: catoptric |
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| catoptrics | (noun) branch of optics dealing with formation of images by mirrors | - |
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| ceftriaxone | (noun) a parenteral cephalosporin (trade name Rocephin) used for severe infection of the lungs or throat or ears or urinary tract | Synonyms: Rocephin |
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| centric | (adjective) having or situated at or near a center | Synonyms: centrical |
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| centrical | (adjective) having or situated at or near a center | Synonyms: centric |
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| centrifugal | (adjective) tending to move away from a center | - |
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| (adjective) tending away from centralization, as of authority | - |
| (adjective) conveying information to the muscles from the CNS | Synonyms: motor |
| centrifugate | (verb) rotate at very high speed in order to separate the liquids from the solids | Synonyms: centrifuge |
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| centrifugation | (noun) the process of separating substances of different densities by the use of a centrifuge | - |
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| centrifuge | (noun) an apparatus that uses centrifugal force to separate particles from a suspension | Synonyms: extractor, separator |
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| (verb) rotate at very high speed in order to separate the liquids from the solids | Synonyms: centrifugate |
| centring | (noun) (American football) putting the ball in play by passing it (between the legs) to a back | Synonyms: centering, snap |
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| (noun) the concentration of attention or energy on something | Synonyms: centering, direction, focal point, focus, focusing, focussing |
| centriole | (noun) one of a pair of small cylindrical cell organelles near the nucleus in animal cells; composed of nine triplet microtubules and form the asters during mitosis | - |
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| centripetal | (adjective) tending to move toward a center | - |
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| (adjective) of a nerve fiber or impulse originating outside and passing toward the central nervous system | Synonyms: receptive, sensory |
| (adjective) tending to unify | Synonyms: unifying |
| centrism | (noun) a political philosophy of avoiding the extremes of left and right by taking a moderate position or course of action | Synonyms: moderatism |
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| centrist | (adjective) supporting or pursuing a course of action that is neither liberal nor conservative | Synonyms: middle-of-the-road |
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| (noun) a person who takes a position in the political center | Synonyms: middle of the roader, moderate, moderationist |
| centrosymmetric | (adjective) having a symmetrical arrangement of radiating parts about a central point | Synonyms: radially symmetrical |
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| cetrimide | (noun) a cationic detergent that is a powerful disinfectant | - |
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| chlorobenzylidenemalononitrile | (noun) a tear gas that is stronger than CN gas but wears off faster; can be deployed by grenades or cluster bombs; can cause skin burns and fatal pulmonary edema | Synonyms: CS gas |
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| cicatrice | (noun) a mark left (usually on the skin) by the healing of injured tissue | Synonyms: cicatrix, scar |
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| cicatrise | (verb) form a scar, after an injury | Synonyms: cicatrize |
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| cicatrix | (noun) a mark left (usually on the skin) by the healing of injured tissue | Synonyms: cicatrice, scar |
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| cicatrize | (verb) form a scar, after an injury | Synonyms: cicatrise |
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| citric | (adjective) of or related to citric acid | - |
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| citrin | (noun) a vitamin that maintains the resistance of cell and capillary walls to permeation | Synonyms: bioflavinoid, vitamin P |
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| citrine | (noun) semiprecious yellow quartz resembling topaz | - |
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| clostridia | (noun) spindle-shaped bacterial cell especially one swollen at the center by an endospore | Synonyms: clostridium |
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| clostridium | (noun) spindle-shaped bacterial cell especially one swollen at the center by an endospore | Synonyms: clostridia |
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| cockatrice | (noun) monster hatched by a reptile from a cock's egg; able to kill with a glance | - |
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| colorimetric | (adjective) of or relating to colorimetry | Synonyms: colorimetrical |
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| colorimetrical | (adjective) of or relating to colorimetry | Synonyms: colorimetric |
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