| humic | <chemistry> Pertaining to, or derived from, vegetable mold; as, humic acid. See Humin. Origin: L. Humus the earth, ground: cf. F. Humique. Source: Websters Dictionary (01 Mar 1998) |
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| humic acids | <chemical> Allomelanins found in soils, coals, and peat, resulting from the decomposition of organic matter, particularly dead plants. They are a mixture of complex macromolecules having polymeric phenolic structures with the ability to chelate metals, especially iron. (merck index, 11th ed) Pharmacological action: chelating agents. Chemical name: Humic acids (12 Dec 1998) |