| acantha | (noun) any sharply pointed projection | Synonyms: spine, spur |
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| acanthion | (noun) the craniometric point at the anterior extremity of the intermaxillary suture | - |
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| acanthocephalan | (noun) any of various worms living parasitically in intestines of vertebrates having a retractile proboscis covered with many hooked spines | Synonyms: spiny-headed worm |
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| acanthocyte | (noun) an abnormal red blood cell that has thorny projections of protoplasm | - |
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| acanthocytosis | (noun) the presence of acanthocytes in the blood stream (as in abetalipoproteinemia) | - |
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| acanthoid | (adjective) shaped like a spine or thorn | Synonyms: acanthous, spinous |
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| acantholysis | (noun) a breakdown of a cell layer in the epidermis (as in pemphigus) | - |
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| acanthoma | (noun) a neoplasm originating in the epidermis | Synonyms: skin tumor |
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| acanthopterygian | (noun) a teleost fish with fins that are supported by sharp inflexible rays | Synonyms: spiny-finned fish |
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| acanthosis | (noun) an abnormal but benign thickening of the prickle-cell layer of the skin (as in psoriasis) | - |
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| acanthotic | (adjective) of or relating to or having acanthosis | - |
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| acanthous | (adjective) shaped like a spine or thorn | Synonyms: acanthoid, spinous |
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| acanthus | (noun) any plant of the genus Acanthus having large spiny leaves and spikes or white or purplish flowers; native to Mediterranean region but widely cultivated | - |
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| aeschynanthus | (noun) a plant of the genus Aeschynanthus having somewhat red or orange flowers and seeds having distinctive hairs at base and apex | - |
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| agapanthus | (noun) any of various plants of the genus Agapanthus having umbels of showy blue to purple flowers | Synonyms: lily of the Nile |
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| ailanthus | (noun) any of several deciduous Asian trees of the genus Ailanthus | - |
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| amaranth | (noun) any of various plants of the genus Amaranthus having dense plumes of green or red flowers; often cultivated for food | - |
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| (noun) seed of amaranth plants used as a native cereal in Central and South America | - |
| amaranthine | (adjective) of or related to the amaranth plant | - |
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| (adjective) of an imaginary flower that never fades | Synonyms: unfading |
| anthelminthic | (adjective) capable of expelling or destroying parasitic worms | Synonyms: anthelmintic, helminthic, parasiticidal |
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| (noun) a medication capable of causing the evacuation of parasitic intestinal worms | Synonyms: anthelmintic, helminthic, vermifuge |
| anthelmintic | (adjective) capable of expelling or destroying parasitic worms | Synonyms: anthelminthic, helminthic, parasiticidal |
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| (noun) a medication capable of causing the evacuation of parasitic intestinal worms | Synonyms: anthelminthic, helminthic, vermifuge |
| anthem | (noun) a song of praise (to God or to a saint or to a nation) | Synonyms: hymn |
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| (noun) a song of devotion or loyalty (as to a nation or school) | - |
| anther | (noun) the part of the stamen that contains pollen; usually borne on a stalk | - |
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| antheral | (adjective) capable of fertilizing female organs | Synonyms: staminate |
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| antheridial | (adjective) relating to or characterized by an antheridium | - |
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| antheridiophore | (noun) gametophore bearing antheridia as in certain mosses and liverworts | - |
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| antheridium | (noun) the male sex organ of spore-producing plants; produces antherozoids; equivalent to the anther in flowers | - |
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| antherozoid | (noun) a motile male gamete of a plant such as an alga or fern or gymnosperm | Synonyms: spermatozoid |
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| anthesis | (noun) the time and process of budding and unfolding of blossoms | Synonyms: blossoming, efflorescence, florescence, flowering, inflorescence |
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| anthill | (noun) a mound of earth made by ants as they dig their nest | Synonyms: formicary |
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| anthologise | (verb) compile an anthology | Synonyms: anthologize |
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| anthologist | (noun) an editor who makes selections for an anthology | - |
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| anthologize | (verb) compile an anthology | Synonyms: anthologise |
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| anthology | (noun) a collection of selected literary passages | - |
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| anthophagous | (adjective) feeding on flowers | Synonyms: anthophilous |
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| anthophilous | (adjective) feeding on flowers | Synonyms: anthophagous |
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| anthophyllite | (noun) a dark brown mineral of the amphibole group; magnesium iron silicate | - |
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| anthozoan | (noun) sessile marine coelenterates including solitary and colonial polyps; the medusoid phase is entirely suppressed | Synonyms: actinozoan |
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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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| anthracitic | (adjective) relating to or resembling anthracite coal | - |
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| anthracosis | (noun) lung disease caused by inhaling coal dust | Synonyms: black lung, black lung disease, coal miner's lung |
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| anthrax | (noun) a highly infectious animal disease (especially cattle and sheep); it can be transmitted to people | Synonyms: splenic fever |
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| (noun) a disease of humans that is not communicable; caused by infection with Bacillus anthracis followed by septicemia | - |
| anthropic | (adjective) relating to mankind or the period of mankind's existence | Synonyms: anthropical |
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| anthropical | (adjective) relating to mankind or the period of mankind's existence | Synonyms: anthropic |
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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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| anthropogenesis | (noun) the evolution or genesis of the human race | Synonyms: anthropogeny |
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| anthropogenetic | (adjective) of or relating to the study of the origins and development of human beings | Synonyms: anthropogenic |
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| anthropogenic | (adjective) of or relating to the study of the origins and development of human beings | Synonyms: anthropogenetic |
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| anthropogeny | (noun) the evolution or genesis of the human race | Synonyms: anthropogenesis |
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| anthropoid | (adjective) resembling human beings | Synonyms: manlike |
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| (adjective) resembling apes | Synonyms: anthropoidal, apelike |
| (noun) any member of the suborder Anthropoidea including monkeys and apes and hominids | - |
| (noun) person who resembles a nonhuman primate | Synonyms: ape |
| anthropoidal | (adjective) resembling apes | Synonyms: anthropoid, apelike |
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| anthropolatry | (noun) the worship of human beings | Synonyms: worship of man |
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| anthropological | (adjective) of or concerned with the science of anthropology | - |
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| anthropologism | (noun) a point of view in which human nature is exhaustively determined by the culture in which a person lives, leaving no room for human agency. | - |
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| anthropologist | (noun) a social scientist who specializes in anthropology | - |
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| anthropology | (noun) the social science that studies the origins and social relationships of human beings | - |
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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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| anthropometry | (noun) measurement and study of the human body and its parts and capacities | - |
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| anthropomorphic | (adjective) suggesting human characteristics for animals or inanimate things | Synonyms: anthropomorphous, humanlike |
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| anthropomorphise | (verb) ascribe human features to something | Synonyms: anthropomorphize |
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| anthropomorphism | (noun) the representation of objects (especially a god) as having human form or traits | Synonyms: theanthropism |
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| anthropomorphize | (verb) ascribe human features to something | Synonyms: anthropomorphise |
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| anthropomorphous | (adjective) suggesting human characteristics for animals or inanimate things | Synonyms: anthropomorphic, humanlike |
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| anthropopathism | (noun) Attribution of human feelings to things not human, such as inanimate objects, animals, or natural phenomena. | - |
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| anthropophagite | (noun) a person who eats human flesh | Synonyms: anthropophagus, cannibal, man-eater |
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| anthropophagous | (adjective) of or relating to eaters of human flesh | - |
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| anthropophagus | (noun) a person who eats human flesh | Synonyms: anthropophagite, cannibal, man-eater |
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| anthropophagy | (noun) human cannibalism; the eating of human flesh | - |
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| anthroposophy | (noun) a system of beliefs and practices based on the philosophy of Rudolf Steiner; it claims to integrate the practical and psychological in child-centered education | - |
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| anthurium | (noun) any of various tropical American plants cultivated for their showy foliage and flowers | Synonyms: tail-flower, tailflower |
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| bryanthus | (noun) procumbent Old World mat-forming evergreen shrub with racemes of pinkish-white flowers | - |
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| calanthe | (noun) any of various showy orchids of the genus Calanthe having white or yellow or rose-colored flowers and broad leaves folded lengthwise | - |
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| canthus | (noun) either of the corners of the eye where the upper and lower eyelids meet | - |
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| chalcanthite | (noun) hydrated blue crystalline form of copper sulfate | Synonyms: blue copperas, blue stone, blue vitriol |
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| chrysanthemum | (noun) any of numerous perennial Old World herbs having showy brightly colored flower heads of the genera Chrysanthemum, Argyranthemum, Dendranthema, Tanacetum; widely cultivated | - |
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| (noun) the flower of a chrysanthemum plant | - |
| clianthus | (noun) any of various shrubs or vines of the genus Clianthus having compound leaves and pea-like red flowers in drooping racemes | Synonyms: glory pea |
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| coelacanth | (noun) fish thought to have been extinct since the Cretaceous period but found in 1938 off the coast of Africa | Synonyms: Latimeria chalumnae |
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| coryphantha | (noun) a cactus of the genus Coryphantha | - |
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| enanthem | (noun) eruption on a mucous membrane (as the inside of the mouth) occurring as a symptom of a disease | Synonyms: enanthema |
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| enanthema | (noun) eruption on a mucous membrane (as the inside of the mouth) occurring as a symptom of a disease | Synonyms: enanthem |
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| epicanthic | (adjective) relating to the epicanthus | - |
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| epicanthus | (noun) a vertical fold of skin over the nasal canthus; typical for many east Asian peoples; sometimes occurs in Down's syndrome | Synonyms: epicanthic fold |
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| exanthem | (noun) eruption on the skin occurring as a symptom of a disease | Synonyms: exanthema, skin eruption |
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| exanthema | (noun) eruption on the skin occurring as a symptom of a disease | Synonyms: exanthem, skin eruption |
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| helianthemum | (noun) any plant of the genus Helianthemum; vigorous plants of stony alpine meadows and dry scrub regions | Synonyms: sun rose, sunrose |
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| helianthus | (noun) any plant of the genus Helianthus having large flower heads with dark disk florets and showy yellow rays | Synonyms: sunflower |
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| hypanthium | (noun) the cuplike or ringlike or tubular structure of a flower which bears the sepals and stamens and calyx (as in Rosaceae) | Synonyms: calyx tube, floral cup |
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| keratoacanthoma | (noun) skin tumor that grows rapidly (especially in older people) and resembles a carcinoma but does not spread; it usually disappears spontaneously, often leaving a scar | - |
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| lanthanide | (noun) any element of the lanthanide series (atomic numbers 57 through 71) | Synonyms: lanthanoid, lanthanon, rare-earth element, rare earth |
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| lanthanoid | (noun) any element of the lanthanide series (atomic numbers 57 through 71) | Synonyms: lanthanide, lanthanon, rare-earth element, rare earth |
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| lanthanon | (noun) any element of the lanthanide series (atomic numbers 57 through 71) | Synonyms: lanthanide, lanthanoid, rare-earth element, rare earth |
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| lanthanum | (noun) a white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth | Synonyms: atomic number 57, La |
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| lycanthrope | (noun) a monster able to change appearance from human to wolf and back again | Synonyms: loup-garou, werewolf, wolfman |
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| lycanthropy | (noun) (folklore) the magical ability of a person to assume the characteristics of a wolf | - |
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| misanthrope | (noun) someone who dislikes people in general | Synonyms: misanthropist |
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| misanthropic | (adjective) believing the worst of human nature and motives; having a sneering disbelief in e.g. selflessness of others | Synonyms: cynical, misanthropical |
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| (adjective) hating mankind in general | Synonyms: misanthropical |
| misanthropical | (adjective) believing the worst of human nature and motives; having a sneering disbelief in e.g. selflessness of others | Synonyms: cynical, misanthropic |
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| (adjective) hating mankind in general | Synonyms: misanthropic |
| misanthropist | (noun) someone who dislikes people in general | Synonyms: misanthrope |
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