| abducent | (adjective) especially of muscles; drawing away from the midline of the body or from an adjacent part | Synonyms: abducting |
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| abecedarian | (adjective) alphabetically arranged (as for beginning readers) | - |
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| abscessed | (adjective) infected and filled with pus | - |
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| acaulescent | (adjective) (of plants) having no apparent stem above ground | Synonyms: stemless |
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| accelerando | (adjective) (music) gradually increasing in tempo | - |
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| accelerated | (adjective) speeded up, as of an academic course | - |
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| accelerative | (adjective) tending to increase velocity | Synonyms: acceleratory |
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| acceleratory | (adjective) tending to increase velocity | Synonyms: accelerative |
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| accented | (adjective) bearing a stress or accent | Synonyms: stressed |
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| (adjective) (used of syllables) bearing the principle stress, usually accompanied by a change in pitch | Synonyms: tonic |
| accentual | (adjective) (of verse) having a metric system based on stress rather than syllables or quantity | - |
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| (adjective) of or pertaining to accent or stress | - |
| acceptable | (adjective) worthy of acceptance or satisfactory | - |
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| (adjective) adequate for the purpose | - |
| (adjective) meeting requirements | Synonyms: decent, satisfactory |
| (adjective) judged to be in conformity with approved usage | - |
| acceptant | (adjective) accepting willingly | Synonyms: acceptive |
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| accepted | (adjective) generally approved or compelling recognition | Synonyms: recognised, recognized |
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| accepting | (adjective) tolerating without protest | - |
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| acceptive | (adjective) inclined to accept rather than reject | - |
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| (adjective) accepting willingly | Synonyms: acceptant |
| accessary | (adjective) aiding and abetting in a crime | Synonyms: accessory |
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| accessible | (adjective) capable of being reached | - |
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| (adjective) easy to get along with or talk to; friendly | - |
| (adjective) easily obtained | - |
| (adjective) capable of being read with comprehension | Synonyms: approachable |
| accessional | (adjective) of or constituting an accession | - |
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| accessorial | (adjective) nonessential but helpful | - |
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| accessory | (adjective) furnishing added support | Synonyms: adjunct, adjuvant, ancillary, appurtenant, auxiliary |
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| (adjective) aiding and abetting in a crime | Synonyms: accessary |
| ace | (adjective) of the highest quality | Synonyms: A-one, crack, first-rate, super, tiptop, top-notch, topnotch, tops |
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| acellular | (adjective) not made up of or divided into cells | Synonyms: noncellular |
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| acentric | (adjective) lacking a centromere | - |
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| (adjective) not centered or having no center | - |
| acephalous | (adjective) lacking a head or a clearly defined head | - |
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| acerate | (adjective) narrow and long and pointed; as pine leaves | Synonyms: acerose, acicular, needle-shaped |
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| acerb | (adjective) sour or bitter in taste | Synonyms: acerbic, astringent |
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| (adjective) harsh or corrosive in tone | Synonyms: acerbic, acid, acrid, bitter, blistering, caustic, sulfurous, sulphurous, virulent, vitriolic |
| acerbic | (adjective) sour or bitter in taste | Synonyms: acerb, astringent |
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| (adjective) harsh or corrosive in tone | Synonyms: acerb, acid, acrid, bitter, blistering, caustic, sulfurous, sulphurous, virulent, vitriolic |
| acerose | (adjective) narrow and long and pointed; as pine leaves | Synonyms: acerate, acicular, needle-shaped |
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| acervate | (adjective) pertaining to a growth of fungi that forms a heaped-up mass | - |
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| acetabular | (adjective) of the cup-shaped socket that receives the head of the thigh bone | Synonyms: cotyloid, cotyloidal |
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| acetic | (adjective) relating to or containing acetic acid | - |
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| acetonic | (adjective) of or relating to acetone | - |
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| acetose | (adjective) tasting or smelling like vinegar | Synonyms: acetous, vinegarish, vinegary |
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| acetous | (adjective) tasting or smelling like vinegar | Synonyms: acetose, vinegarish, vinegary |
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| acetylenic | (adjective) of or related to acetylene | - |
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| acetylic | (adjective) of or related to acetic acid | - |
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| acquiescent | (adjective) willing to carry out the orders or wishes of another without protest | Synonyms: biddable |
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| acrocentric | (adjective) having a subterminal centromere | - |
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| actinomycetal | (adjective) of or belonging to the actinomycetes | Synonyms: actinomycetous |
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| actinomycetous | (adjective) of or belonging to the actinomycetes | Synonyms: actinomycetal |
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| adducent | (adjective) especially of muscles; bringing together or drawing toward the midline of the body or toward an adjacent part | Synonyms: adducting, adductive |
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| adjacent | (adjective) nearest in space or position; immediately adjoining without intervening space | Synonyms: next, side by side |
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| (adjective) having a common boundary or edge; abutting; touching | Synonyms: conterminous, contiguous, neighboring, neighbouring |
| (adjective) near or close to but not necessarily touching | - |
| adolescent | (adjective) relating to or peculiar to or suggestive of an adolescent | - |
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| (adjective) in the state of development between puberty and maturity | - |
| (adjective) displaying or suggesting a lack of maturity | Synonyms: jejune, juvenile, puerile |
| (adjective) being of the age 13 through 19 | Synonyms: teen, teenage, teenaged |
| advance | (adjective) being ahead of time or need | Synonyms: beforehand |
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| (adjective) situated ahead or going before | Synonyms: advanced, in advance |
| advanced | (adjective) (of societies) highly developed especially in technology or industry | - |
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| (adjective) situated ahead or going before | Synonyms: advance, in advance |
| (adjective) ahead in development; complex or intricate | Synonyms: sophisticated |
| (adjective) far along in time | Synonyms: ripe |
| (adjective) comparatively late in a course of development | - |
| (adjective) farther along in physical or mental development | - |
| (adjective) ahead of the times | Synonyms: forward-looking, innovative, modern |
| (adjective) at a higher level in training or knowledge or skill | - |
| albescent | (adjective) becoming or shading into white | - |
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| alcalescent | (adjective) tending to become alkaline; slightly alkaline | Synonyms: alkalescent |
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| alkalescent | (adjective) tending to become alkaline; slightly alkaline | Synonyms: alcalescent |
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| alliaceous | (adjective) of or pertaining to the botanical genus Allium | - |
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| (adjective) smelling of onions or garlic | - |
| amentaceous | (adjective) (of plants) bearing or characterized by aments or catkins | Synonyms: amentiferous |
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| amylaceous | (adjective) resembling starch | Synonyms: amyloid, amyloidal, farinaceous, starchlike |
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| ancestral | (adjective) of or belonging to or inherited from an ancestor | - |
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| (adjective) inherited or inheritable by established rules (usually legal rules) of descent | Synonyms: hereditary, patrimonial, transmissible |
| anencephalic | (adjective) characterized by partial or total absence of a brain | Synonyms: anencephalous |
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| anencephalous | (adjective) characterized by partial or total absence of a brain | Synonyms: anencephalic |
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| announced | (adjective) declared publicly; made widely known | Synonyms: proclaimed |
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| antecedent | (adjective) preceding in time or order | - |
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| anthropocentric | (adjective) human-centered | - |
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| anticancer | (adjective) used in the treatment of cancer | Synonyms: antineoplastic, antitumor, antitumour |
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| aplacental | (adjective) having no placenta | - |
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| apocynaceous | (adjective) of or relating to tropical plants of the family Apocynaceae | - |
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| apperceptive | (adjective) able to relate new percepts to past experience | - |
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| apprenticed | (adjective) bound by contract | Synonyms: articled, bound, indentured |
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| araceous | (adjective) relating to a plant of the family Araceae | Synonyms: aroid |
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| arboraceous | (adjective) abounding in trees | Synonyms: arboreous, woodsy, woody |
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| arborescent | (adjective) resembling a tree in form and branching structure | Synonyms: arboreal, arboreous, arboresque, arboriform, dendriform, dendroid, dendroidal, tree-shaped, treelike |
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| arced | (adjective) forming or resembling an arch | Synonyms: arched, arching, arciform, arcuate, bowed |
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| archdiocesan | (adjective) of or relating to an archdiocese | - |
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| arenaceous | (adjective) resembling or containing or abounding in sand; or growing in sandy areas | Synonyms: sandlike, sandy |
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| argillaceous | (adjective) resembling or containing clay | Synonyms: clayey |
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| arundinaceous | (adjective) of or relating to or resembling reedlike plants of the genus Arundinaria | - |
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| ascendable | (adjective) capable of being ascended | Synonyms: ascendible, climbable |
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| ascendant | (adjective) tending or directed upward | Synonyms: ascendent, ascensive |
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| (adjective) most powerful or important or influential | Synonyms: ascendent, dominating |
| ascendent | (adjective) tending or directed upward | Synonyms: ascendant, ascensive |
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| (adjective) most powerful or important or influential | Synonyms: ascendant, dominating |
| ascendible | (adjective) capable of being ascended | Synonyms: ascendable, climbable |
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| ascending | (adjective) moving or going or growing upward | - |
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| ascensional | (adjective) tending to rise | - |
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| ascensive | (adjective) tending or directed upward | Synonyms: ascendant, ascendent |
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| ascertainable | (adjective) capable of being ascertained or found out | Synonyms: discoverable |
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| ascertained | (adjective) discovered or determined by scientific observation | Synonyms: discovered, observed |
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| ascetic | (adjective) pertaining to or characteristic of an ascetic or the practice of rigorous self-discipline | Synonyms: ascetical |
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| (adjective) practicing great self-denial | Synonyms: ascetical, austere, spartan |
| ascetical | (adjective) pertaining to or characteristic of an ascetic or the practice of rigorous self-discipline | Synonyms: ascetic |
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| (adjective) practicing great self-denial | Synonyms: ascetic, austere, spartan |
| asclepiadaceous | (adjective) of or relating to plants of the milkweed family | - |
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| ascomycetous | (adjective) related to or characteristic of fungi of the class Ascomycetes | - |
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| askance | (adjective) (used especially of glances) directed to one side with or as if with doubt or suspicion or envy | Synonyms: askant, asquint, sidelong, squint-eyed, squint, squinty |
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| autofluorescent | (adjective) emitting light via self-induced fluorescence | - |
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| balanced | (adjective) being in a state of proper equilibrium | - |
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| barefaced | (adjective) with no effort to conceal | Synonyms: bald |
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| (adjective) unrestrained by convention or propriety | Synonyms: audacious, bald-faced, bodacious, brassy, brazen-faced, brazen, insolent |
| basidiomycetous | (adjective) pertaining to or characteristic of fungi of the class Basidiomycetes | - |
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| beneficed | (adjective) having a benefice | - |
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| beneficent | (adjective) doing or producing good | - |
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| (adjective) generous in assistance to the poor | Synonyms: benevolent, eleemosynary, philanthropic |
| betulaceous | (adjective) of or pertaining to or characteristic of trees of the birch family | - |
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| bicentenary | (adjective) of or relating to or completing a period of 200 years | Synonyms: bicentennial |
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| bicentennial | (adjective) of or relating to or completing a period of 200 years | Synonyms: bicentenary |
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| bicentric | (adjective) having two centers | - |
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| bicephalous | (adjective) having two heads | - |
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| biface | (adjective) having two faces or fronts | Synonyms: bifacial |
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| bignoniaceous | (adjective) of or pertaining to or characteristic of plants of the family Bignoniaceae | - |
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| bioluminescent | (adjective) (of living organisms) emitting light | - |
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| braced | (adjective) positioned so as to be ready for confrontation or danger | - |
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| (adjective) held up by braces or buttresses | Synonyms: buttressed |
| brachycephalic | (adjective) having a short broad head with a cephalic index of over 80 | Synonyms: brachycranial, brachycranic |
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