| adrenosterone | (noun) a steroid having androgenic activity; obtained from the cortex of the adrenal gland | - |
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| aeronaut | (noun) someone who operates an aircraft | Synonyms: aviator, flier, flyer |
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| aeronautic | (adjective) of or pertaining to aeronautics | Synonyms: aeronautical |
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| aeronautical | (adjective) of or pertaining to aeronautics | Synonyms: aeronautic |
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| aeronautics | (noun) the theory and practice of navigation through air or space | Synonyms: astronautics |
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| aileron | (noun) an airfoil that controls lateral motion | - |
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| aldosterone | (noun) a corticosteroid hormone that is secreted by the cortex of the adrenal gland; regulates salt (sodium and potassium) and water balance | - |
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| aldosteronism | (noun) a condition caused by overproduction of aldosterone | Synonyms: hyperaldosteronism |
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| androsterone | (noun) an androgenic hormone that is less active than testosterone | - |
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| archenteron | (noun) central cavity of the gastrula; becomes the intestinal or digestive cavity | - |
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| chaperon | (noun) one who accompanies and supervises a young woman or gatherings of young people | Synonyms: chaperone |
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| (verb) accompany as a chaperone | Synonyms: chaperone |
| chaperone | (noun) one who accompanies and supervises a young woman or gatherings of young people | Synonyms: chaperon |
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| (verb) accompany as a chaperone | Synonyms: chaperon |
| cicerone | (noun) a guide who conducts and informs sightseers | - |
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| coelenteron | (noun) the saclike body cavity of a coelenterate | - |
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| corticosterone | (noun) secreted by the adrenal cortex; involved in regulating water and electrolyte balance in the body | - |
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| deuteron | (noun) the nucleus of deuterium; consists of one proton and one neutron; used as a bombarding particle in accelerators | - |
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| dipteron | (noun) insects having usually a single pair of functional wings (anterior pair) with the posterior pair reduced to small knobbed structures and mouth parts adapted for sucking or lapping or piercing | Synonyms: dipteran, dipterous insect, two-winged insects |
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| enteron | (noun) the alimentary canal (especially of an embryo or a coelenterate) | - |
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| ephemeron | (noun) anything short-lived, as an insect that lives only for a day in its winged form | Synonyms: ephemeral |
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| gerontocracy | (noun) a political system governed by old men | - |
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| gerontological | (adjective) of or relating to or practicing geriatrics | Synonyms: geriatric |
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| gerontologist | (noun) a specialist in gerontology | Synonyms: geriatrician |
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| gerontology | (noun) the branch of medical science that deals with diseases and problems specific to old people | Synonyms: geriatrics |
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| hemipteron | (noun) insects with sucking mouthparts and forewings thickened and leathery at the base; usually show incomplete metamorphosis | Synonyms: bug, hemipteran, hemipterous insect |
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| heron | (noun) grey or white wading bird with long neck and long legs and (usually) long bill | - |
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| heronry | (noun) a breeding ground for herons; a heron rookery | - |
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| heteronym | (noun) two words are heteronyms if they are spelled the same way but differ in pronunciation | - |
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| hymenopteron | (noun) insects having two pairs of membranous wings and an ovipositor specialized for stinging or piercing | Synonyms: hymenopter, hymenopteran, hymenopterous insect |
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| hyperaldosteronism | (noun) a condition caused by overproduction of aldosterone | Synonyms: aldosteronism |
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| hyperon | (noun) any baryon that is not a nucleon; unstable particle with mass greater than a neutron | - |
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| interferon | (noun) an antiviral protein produced by cells that have been invaded by a virus; inhibits replication of the virus | - |
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| lepidopteron | (noun) insect that in the adult state has four wings more or less covered with tiny scales | Synonyms: lepidopteran, lepidopterous insect |
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| medroxyprogesterone | (noun) a progestin compound (trade name Provera) used to treat menstrual disorders | Synonyms: Provera |
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| meronym | (noun) a word that names a part of a larger whole | Synonyms: part name |
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| meronymy | (noun) the semantic relation that holds between a part and the whole | Synonyms: part to whole relation |
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| methyltestosterone | (noun) an androgenic compound contained in drugs that are used to treat testosterone deficiency and female breast cancer and to stimulate growth and weight gain | - |
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| moneron | (noun) organisms that typically reproduce by asexual budding or fission and whose nutritional mode is absorption or photosynthesis or chemosynthesis | Synonyms: moneran |
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| neuropteron | (noun) insect having biting mouthparts and four large membranous wings with netlike veins | Synonyms: neuropteran, neuropterous insect |
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| operon | (noun) a segment of DNA containing adjacent genes including structural genes and an operator gene and a regulatory gene | - |
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| orthopteron | (noun) any of various insects having leathery forewings and membranous hind wings and chewing mouthparts | Synonyms: orthopteran, orthopterous insect |
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| pepperoni | (noun) a pork and beef sausage (or a thin slice of this sausage) | - |
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| peroneal | (adjective) of or relating to the fibula or the outer part of the leg below the knee | - |
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| peroneus | (noun) muscle of the lower leg that is involved in moving the foot | - |
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| progesterone | (noun) a steroid hormone (trade name Lipo-Lutin) produced in the ovary; prepares and maintains the uterus for pregnancy | Synonyms: Lipo-Lutin |
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| testosterone | (noun) a potent androgenic hormone produced chiefly by the testes; responsible for the development of male secondary sex characteristics | - |
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| thysanopteron | (noun) an insect of the order Thysanoptera | Synonyms: thysanopter, thysanopterous insect |
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| trichopteron | (noun) caddis fly | Synonyms: trichopteran, trichopterous insect |
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| veronal | (noun) a barbiturate used as a hypnotic | Synonyms: barbital, barbitone, diethylbarbituric acid, diethylmalonylurea |
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| veronica | (noun) any plant of the genus Veronica | Synonyms: speedwell |
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