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fertilizer

(Encyclopedia) fertilizer, organic or inorganic material containing one or more of the nutrients—mainly nitrogen, phosphorus, and potassium, and other essential elements required for plant growth.…

metabolism

(Encyclopedia) metabolism, sum of all biochemical processes involved in life. Two subcategories of metabolism are anabolism, the building up of complex organic molecules from simpler precursors, and…

hyperinsulinism

(Encyclopedia) hyperinsulinism, presence in the system of an above-normal amount of insulin, the substance secreted by the pancreas and needed by the body to utilize sugar. An increased amount of…

acid anhydride

(Encyclopedia) acid anhydrideacid anhydrideănhīˈdrīd, –drəd [key], chemical compound that reacts with water to form an acid (see acids and bases). Anhydrides of inorganic acids are usually oxides of…

caustic

(Encyclopedia) caustic, any strongly corrosive chemical substance, especially one that attacks organic matter. A caustic alkali is a metal hydroxide, especially that of an alkali metal; caustic soda…

anthracene

(Encyclopedia) CE5 anthraceneanthraceneănˈthrəsēn [key], C14H10, solid organic compound derived from coal tar. It melts at 218℃ and boils at 354℃. When pure it is colorless and has a violet…

oxalic acid

(Encyclopedia) oxalic acidoxalic acidŏksălˈĭk [key] or ethanedioic acidethanedioic acidĕthˌāndīōĭk [key], HO2CCO2H, a colorless, crystalline organic carboxylic acid that melts at 189℃ with…

ketone

(Encyclopedia) CE5 Ketones ketoneketonekēˈtōn [key], any of a class of organic compounds that contain the carbonyl group, C=O, and in which the carbonyl group is bonded only to carbon atoms. The…