humic acid

humic acid
a complex mixture of organic acids produced by the decomposition of vegetable matter

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  • Humic acid — is one of the major components of humic substances [] which are dark brown and major constituents of soil organic matter humus that contributes to soil chemical and physical quality and are also precursors …   Wikipedia

  • humic acid — n. a brown powder consisting of organic acids, derived from humus …   English World dictionary

  • humic acid — a brown, melanin tinted mixture of polymers, found in lignite, peat, and soils, where it acts as a cation exchange agent: used in drilling fluids and inks. [1835 45] * * * ▪ chemistry       one of two classes of natural acidic organic polymer… …   Universalium

  • humic acid — noun a dark brown humic substance that is soluble in water only at pH values greater than 2 the half life of humic acid is measured in centuries • Hypernyms: ↑humic substance * * * noun : any of various organic acids that are insoluble in alcohol …   Useful english dictionary

  • humic acid — Humin Hu min, n. [L. humus the earth, ground.] (Chem.) A bitter, brownish yellow, amorphous substance, extracted from vegetable mold, and also produced by the action of acids on certain sugars and carbohydrates; called also {humic acid}, {ulmin} …   The Collaborative International Dictionary of English

  • humic acid — hu·mic acid hyü mik , yü n any of various organic acids obtained from humus …   Medical dictionary

  • humic acid — noun Date: 1843 any of various organic acids obtained from humus …   New Collegiate Dictionary

  • Humic — Hu mic, a. [L. humus the earth, ground: cf. F. humique.] (Chem.) Pertaining to, or derived from, vegetable mold; as, humic acid. See {Humin}. [1913 Webster] …   The Collaborative International Dictionary of English

  • humic substance — noun an organic residue of decaying organic matter • Hypernyms: ↑organic compound • Hyponyms: ↑fulvic acid, ↑humic acid, ↑humin …   Useful english dictionary

  • humic — HÚMIC, humice, adj.n. (Despre sol) Bogat în humus. – Din fr. humique. Trimis de gall, 13.09.2007. Sursa: DEX 98  húmic adj. m., pl. húmici; f. sg. húmică, pl. húmice …   Dicționar Român

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