nutritive material

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• nutritive equilibrium — physiologic equilibrium the condition in which the amount of material taken into the body exactly equals the amount discharged …   Medical dictionary

• trophotropism — Chemotaxis of living cells in relation to nutritive material; it may be positive (toward nutritive material) or negative (away from nutritive material). SYN: trophotaxis. [tropho + G. trope, a turning] * * * tro·pho·tro·pism (tro″fo troґpiz …   Medical dictionary

• egg — egg1 eggless, adj. eggy, adj. /eg/, n. 1. the roundish reproductive body produced by the female of certain animals, as birds and most reptiles, consisting of an ovum and its envelope of albumen, jelly, membranes, egg case, or shell, according to… …   Universalium

• gastropod — /gas treuh pod /, n. 1. any mollusk of the class Gastropoda, comprising the snails, whelks, slugs, etc. adj. 2. Also, gastropodous /ga strop euh deuhs/. belonging or pertaining to the gastropods. [1820 30; < NL Gast(e)ropoda a class of mollusks.… …   Universalium

• equilibrium — 1. The condition of being evenly balanced; a state of repose between two or more antagonistic forces that exactly counteract each other. 2. In chemistry, a state of apparent repose created by two reactions proceeding in opposite directions at… …   Medical dictionary

• endosperm — /en deuh sperrm /, n. Bot. nutritive matter in seed plant ovules, derived from the embryo sac. [1840 50; < F endosperme; see ENDO , SPERM] * * * ▪ plant tissue       tissue that surrounds and nourishes the embryo in the angiosperm seed. The… …   Universalium

• alimentary — Relating to food or nutrition. [L. alimentarius, fr. alimentum, nourishment] * * * al·i·men·ta·ry .al ə ment ə rē, men trē adj of, concerned with, or relating to nourishment or to the function of nutrition: NUTRITIVE <alimentary processes of… …   Medical dictionary

• fuel — I. noun Usage: often attributive Etymology: Middle English fewel, from Anglo French fuail, feuaile, from Vulgar Latin *focalia, from Latin focus hearth Date: 13th century 1. a. a material used to produce heat or power by burning b. nutritive… …   New Collegiate Dictionary

• History of Medicine —     History of Medicine     † Catholic Encyclopedia ► History of Medicine     The history of medical science, considered as a part of the general history of civilization, should logically begin in Mesopotamia, where tradition and philological… …   Catholic encyclopedia

• yolk — 1. One of the types of nutritive material stored in the ovum for the nutrition of the embryo; y. is particularly abundant and conspicuous in the eggs of birds. SYN: vitellus. 2. Fatty material found in the wool of sheep; when extracted and… …   Medical dictionary

• yolk — yolked, adj. yolkless, adj. yolky, adj. /yohk, yohlk/, n. 1. the yellow and principal substance of an egg, as distinguished from the white. 2. Embryol. the part of the contents of the egg of an animal that enters directly into the formation of… …   Universalium