| acanthoid | (adjective) shaped like a spine or thorn | Synonyms: acanthous, spinous |
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| acid | (adjective) having the characteristics of an acid | - |
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| (adjective) being sour to the taste | Synonyms: acidic, acidulent, acidulous |
| (adjective) harsh or corrosive in tone | Synonyms: acerb, acerbic, acrid, bitter, blistering, caustic, sulfurous, sulphurous, virulent, vitriolic |
| acrid | (adjective) strong and sharp | Synonyms: pungent |
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| (adjective) harsh or corrosive in tone | Synonyms: acerb, acerbic, acid, bitter, blistering, caustic, sulfurous, sulphurous, virulent, vitriolic |
| actinoid | (adjective) having a radial form | - |
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| adenoid | (adjective) relating to or resembling lymphatic glands or lymphoid tissue | - |
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| aforesaid | (adjective) being the one previously mentioned or spoken of | Synonyms: aforementioned, said |
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| afraid | (adjective) filled with fear or apprehension | - |
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| (adjective) filled with regret or concern; used often to soften an unpleasant statement | - |
| (adjective) having feelings of aversion or unwillingness | - |
| (adjective) feeling worry or concern or insecurity | - |
| algid | (adjective) chilly | - |
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| algoid | (adjective) of or resembling algae | - |
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| allantoid | (adjective) shaped like a sausage | Synonyms: sausage-shaped |
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| ameboid | (adjective) like an amoeba (especially in having a variable irregular shape) | Synonyms: amoeboid |
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| amoeboid | (adjective) like an amoeba (especially in having a variable irregular shape) | Synonyms: ameboid |
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| amygdaloid | (adjective) shaped like an almond | Synonyms: almond-shaped, amygdaliform, amygdaloidal |
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| amyloid | (adjective) resembling starch | Synonyms: amylaceous, amyloidal, farinaceous, starchlike |
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| aneroid | (adjective) containing no liquid or actuated without the use of liquid | - |
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| aneuploid | (adjective) having a chromosome number that is not an exact multiple of the haploid number | - |
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| annelid | (adjective) relating to or belonging to or characteristic of any worms of the phylum Annelida | Synonyms: annelidan |
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| antacid | (adjective) acting to neutralize acid (especially in the stomach) | - |
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| anthropoid | (adjective) resembling human beings | Synonyms: manlike |
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| (adjective) resembling apes | Synonyms: anthropoidal, apelike |
| antiapartheid | (adjective) opposing the policy of apartheid in South Africa | - |
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| antithyroid | (adjective) having the effect of counteracting excessive thyroid activity | - |
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| apoplectoid | (adjective) resembling apoplexy | Synonyms: apoplectiform |
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| arachnoid | (adjective) relating to or resembling a member of the class Arachnida | Synonyms: arachnidian, spiderlike, spiderly, spidery |
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| arid | (adjective) lacking sufficient water or rainfall | Synonyms: waterless |
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| (adjective) lacking vitality or spirit; lifeless | Synonyms: desiccate, desiccated |
| aroid | (adjective) relating to a plant of the family Araceae | Synonyms: araceous |
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| asteroid | (adjective) shaped like a star | Synonyms: star-shaped |
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| avid | (adjective) (often followed by `for') ardently or excessively desirous | Synonyms: devouring, esurient, greedy |
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| (adjective) marked by active interest and enthusiasm | Synonyms: zealous |
| bacterioid | (adjective) resembling bacteria | Synonyms: bacterioidal, bacteroid, bacteroidal |
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| bacteroid | (adjective) resembling bacteria | Synonyms: bacterioid, bacterioidal, bacteroidal |
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| bedrid | (adjective) confined to bed (by illness) | Synonyms: bedfast, bedridden, sick-abed |
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| benzenoid | (adjective) similar to benzene in structure or linkage | - |
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| bicuspid | (adjective) having two cusps or points (especially a molar tooth) | Synonyms: bicuspidate |
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| bifid | (adjective) divided into two lobes | - |
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| bipinnatifid | (adjective) pinnatifid with the segments also pinnatifid | - |
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| bitumenoid | (adjective) like bitumen | Synonyms: bituminoid |
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| bituminoid | (adjective) like bitumen | Synonyms: bitumenoid |
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| boskopoid | (adjective) belonging or relating to or resembling Boskop man | - |
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| botryoid | (adjective) resembling a cluster of grapes in form | Synonyms: botryoidal, boytrose |
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| bovid | (adjective) of or relating to or belonging to the genus Bos (cattle) | Synonyms: bovine |
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| bungaloid | (adjective) characterized by bungalows | - |
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| cancroid | (adjective) of or relating to a cancroid | - |
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| candid | (adjective) characterized by directness in manner or speech; without subtlety or evasion | Synonyms: blunt, forthright, frank, free-spoken, outspoken, plainspoken, point-blank, straight-from-the-shoulder |
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| (adjective) openly straightforward and direct without reserve or secretiveness | Synonyms: heart-to-heart, open |
| (adjective) informal or natural; especially caught off guard or unprepared | - |
| carangid | (adjective) of or relating to fish of the family Carangidae | - |
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| carotid | (adjective) of or relating to either of the two major arteries supplying blood to the head and neck | - |
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| celluloid | (adjective) artificial as if portrayed in a film | Synonyms: synthetic |
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| cellulosid | (adjective) of or containing or made from cellulose | - |
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| coccoid | (adjective) spherical; like a coccus | - |
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| cotyloid | (adjective) of the cup-shaped socket that receives the head of the thigh bone | Synonyms: acetabular, cotyloidal |
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| crinoid | (adjective) of or relating to or belonging to the class Crinoidea | - |
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| ctenoid | (adjective) resembling a comb; having projections like the teeth of a comb | Synonyms: comb-like |
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| cuboid | (adjective) shaped like a cube | Synonyms: cube-shaped, cubelike, cubical, cubiform, cuboidal |
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| cycloid | (adjective) resembling a circle | Synonyms: cycloidal |
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| cyprinid | (adjective) of or relating to members of fish family Cyprinidae | Synonyms: cyprinoid |
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| cyprinoid | (adjective) of or relating to members of fish family Cyprinidae | Synonyms: cyprinid |
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| deltoid | (adjective) triangular or suggesting a capital delta, with a point at the apex | - |
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| dendroid | (adjective) resembling a tree in form and branching structure | Synonyms: arboreal, arboreous, arborescent, arboresque, arboriform, dendriform, dendroidal, tree-shaped, treelike |
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| devoid | (adjective) completely wanting or lacking | Synonyms: barren, destitute, free, innocent |
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| diploid | (adjective) of a cell or organism having two sets of chromosomes or twice the haploid number | - |
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| discoid | (adjective) having a flat circular shape | Synonyms: disc-shaped, disclike, discoidal, disk-shaped, disklike |
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| ellipsoid | (adjective) having the nature or shape of an ellipsoid | Synonyms: ellipsoidal, spheroidal |
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| epithelioid | (adjective) of or belonging to the epithelium | Synonyms: epithelial |
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| erythroid | (adjective) relating to erythrocytes | - |
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| fervid | (adjective) (archaic) extremely hot, burning, or glowing | Synonyms: fervent |
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| (adjective) characterized by intense emotion | Synonyms: ardent, fervent, fiery, impassioned, perfervid, torrid |
| fetid | (adjective) offensively malodorous | Synonyms: foetid, foul-smelling, foul, funky, ill-scented, noisome, smelly, stinking |
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| filariid | (adjective) of or relating to or belonging to the family Filariidae | - |
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| flaccid | (adjective) drooping without elasticity; wanting in stiffness | - |
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| (adjective) out of condition; not strong or robust; incapable of exertion or endurance | Synonyms: flabby, soft |
| florid | (adjective) elaborately or excessively ornamented | Synonyms: aureate, flamboyant |
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| (adjective) inclined to a healthy reddish color often associated with outdoor life | Synonyms: rubicund, ruddy, sanguine |
| fluid | (adjective) subject to change; variable | Synonyms: unstable |
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| (adjective) in cash or easily convertible to cash | Synonyms: liquid |
| (adjective) smooth and unconstrained in movement | Synonyms: fluent, liquid, smooth |
| (adjective) characteristic of a fluid; capable of flowing and easily changing shape | Synonyms: runny |
| (adjective) affording change (especially in social status) | Synonyms: mobile |
| foetid | (adjective) offensively malodorous | Synonyms: fetid, foul-smelling, foul, funky, ill-scented, noisome, smelly, stinking |
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| frigid | (adjective) extremely cold | Synonyms: arctic, gelid, glacial, icy, polar |
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| (adjective) devoid of warmth and cordiality; expressive of unfriendliness or disdain | Synonyms: frosty, frozen, glacial, icy, wintry |
| (adjective) sexually unresponsive | Synonyms: cold |
| fulgid | (adjective) having brief brilliant points or flashes of light | Synonyms: aglitter, coruscant, glinting, glistering, glittering, glittery, scintillant, scintillating, sparkly |
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| fungoid | (adjective) resembling fungi | Synonyms: funguslike |
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| gelid | (adjective) extremely cold | Synonyms: arctic, frigid, glacial, icy, polar |
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| gravid | (adjective) in an advanced stage of pregnancy | Synonyms: big, enceinte, expectant, great, heavy, large, with child |
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| haploid | (adjective) of a cell or organism having a single set of chromosomes | Synonyms: haploidic, monoploid |
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| hispid | (adjective) (of animals or plants) having stiff coarse hairs or bristles | - |
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| hominid | (adjective) characterizing the family Hominidae, which includes Homo sapiens as well as extinct species of manlike creatures | Synonyms: hominian |
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| horrid | (adjective) exceedingly bad | - |
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| (adjective) grossly offensive to decency or morality; causing horror | Synonyms: hideous, horrific, outrageous |
| humid | (adjective) containing or characterized by a great deal of water vapor | - |
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| hyaloid | (adjective) resembling glass in transparency or translucency | Synonyms: hyaline |
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| hybrid | (adjective) produced by crossbreeding | Synonyms: intercrossed |
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| hyoid | (adjective) of or relating to the hyoid bone | - |
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| hypnoid | (adjective) of or relating to a state of sleep or hypnosis | - |
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| inlaid | (adjective) adorned by inlays | - |
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| insipid | (adjective) lacking taste or flavor or tang | Synonyms: bland, flat, flavorless, flavourless, savorless, savourless, vapid |
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| (adjective) lacking interest or significance or impact | Synonyms: jejune |
| intrepid | (adjective) invulnerable to fear or intimidation | Synonyms: audacious, brave, dauntless, fearless, hardy, unfearing |
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| invalid | (adjective) having no cogency or legal force | - |
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| (adjective) no longer valid | - |
| laid | (adjective) set down according to a plan | Synonyms: set |
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| languid | (adjective) lacking spirit or liveliness | Synonyms: dreamy, lackadaisical, languorous |
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| limacoid | (adjective) of or resembling a slug | Synonyms: limacine |
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| limpid | (adjective) (of language) transparently clear; easily understandable | Synonyms: crystal clear, lucid, luculent, pellucid, perspicuous |
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| (adjective) transmitting light; able to be seen through with clarity | Synonyms: crystal clear, crystalline, lucid, pellucid, transparent |
| (adjective) clear and bright | Synonyms: liquid |
| liquid | (adjective) existing as or having characteristics of a liquid; especially tending to flow | - |
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| (adjective) changed from a solid to a liquid state | Synonyms: liquified, melted |
| (adjective) clear and bright | Synonyms: limpid |
| (adjective) in cash or easily convertible to cash | Synonyms: fluid |
| (adjective) smooth and unconstrained in movement | Synonyms: fluent, fluid, smooth |
| (adjective) smooth and flowing in quality; entirely free of harshness | - |
| (adjective) filled or brimming with tears | Synonyms: swimming |
| livid | (adjective) furiously angry | - |
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| (adjective) anemic looking from illness or emotion | Synonyms: ashen, blanched, bloodless, white |
| (adjective) discolored by coagulation of blood beneath the skin | Synonyms: black-and-blue |
| (adjective) (of a light) imparting a deathlike luminosity | - |
| lucid | (adjective) (of language) transparently clear; easily understandable | Synonyms: crystal clear, limpid, luculent, pellucid, perspicuous |
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| (adjective) transmitting light; able to be seen through with clarity | Synonyms: crystal clear, crystalline, limpid, pellucid, transparent |
| (adjective) capable of thinking and expressing yourself in a clear and consistent manner | Synonyms: coherent, logical |
| (adjective) having a clear mind | - |
| lurid | (adjective) shining with an unnatural red glow as of fire seen through smoke | - |
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| (adjective) ghastly pale | - |
| (adjective) glaringly vivid and graphic; marked by sensationalism | Synonyms: shocking |
| (adjective) horrible in fierceness or savagery | - |
| lymphoid | (adjective) resembling lymph or lymphatic tissues | - |
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| mastoid | (adjective) relating to or resembling a nipple | Synonyms: mastoidal |
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| (adjective) of or relating to or in the region of the mastoid process | - |
| medusoid | (adjective) relating to or resembling a medusa | - |
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| metalloid | (adjective) of or being a nonmetallic element that has some of the properties of metal | - |
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| mid | (adjective) used in combination to denote the middle | - |
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