| adrenal | (noun) either of a pair of complex endocrine glands situated near the kidney | Synonyms: adrenal gland, suprarenal gland |
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| adrenalectomy | (noun) surgical removal of one or both adrenal glands | Synonyms: suprarenalectomy |
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| adrenaline | (noun) a catecholamine secreted by the adrenal medulla in response to stress (trade name Adrenalin); stimulates autonomic nerve action | Synonyms: Adrenalin, epinephrin, epinephrine |
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| adrenarche | (noun) the increase in activity of the adrenal glands just before puberty | - |
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| andrena | (noun) a bee that is a member of the genus Andrena | Synonyms: andrenid, mining bee |
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| arena | (noun) a playing field where sports events take place | Synonyms: scene of action |
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| (noun) a large structure for open-air sports or entertainments | Synonyms: bowl, sports stadium, stadium |
| (noun) the central area of an ancient Roman amphitheater where contests and spectacles were held; especially an area that was strewn with sand | - |
| (noun) a particular environment or walk of life | Synonyms: area, domain, field, orbit, sphere |
| arenavirus | (noun) animal viruses belonging to the family Arenaviridae | - |
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| crenation | (noun) one of a series of rounded projections (or the notches between them) formed by curves along an edge (as the edge of a leaf or piece of cloth or the margin of a shell or a shriveled red blood cell observed in a hypertonic solution etc.) | Synonyms: crenature, crenel, crenelle, scallop |
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| crenature | (noun) one of a series of rounded projections (or the notches between them) formed by curves along an edge (as the edge of a leaf or piece of cloth or the margin of a shell or a shriveled red blood cell observed in a hypertonic solution etc.) | Synonyms: crenation, crenel, crenelle, scallop |
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| forename | (noun) the name that precedes the surname | Synonyms: first name, given name |
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| grenade | (noun) a small explosive bomb thrown by hand or fired from a missile | - |
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| grenadier | (noun) deep-sea fish with a large head and body and long tapering tail | Synonyms: rattail, rattail fish |
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| (noun) an infantryman equipped with grenades | Synonyms: grenade thrower |
| grenadine | (noun) thin syrup made from pomegranate juice; used in mixed drinks | - |
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| hyperadrenalism | (noun) a glandular disorder caused by excessive ACTH resulting in greater than normal functioning of the adrenal gland; characterized by obesity | Synonyms: Cushing's disease |
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| hypoadrenalism | (noun) a glandular disorder caused by failure of function of the cortex of the adrenal gland and marked by anemia and prostration with brownish skin | Synonyms: Addison's disease, Addison's syndrome, hypoadrenocorticism |
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| noradrenaline | (noun) a catecholamine precursor of epinephrine that is secreted by the adrenal medulla and also released at synapses | Synonyms: norepinephrine |
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| renascence | (noun) a second or new birth | Synonyms: rebirth, reincarnation |
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| serenade | (noun) a song characteristically played outside the house of a woman | - |
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| (noun) a musical composition in several movements; has no fixed form | Synonyms: divertimento |
| suprarenalectomy | (noun) surgical removal of one or both adrenal glands | Synonyms: adrenalectomy |
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| trenail | (noun) a wooden peg that is used to fasten timbers in shipbuilding; water causes the peg to swell and hold the timbers fast | Synonyms: treenail, trunnel |
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