Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The part of the organic matter in soil that does not dissolve in dilute alkali

from the GNU version of the Collaborative International Dictionary of English

  • n. 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, gein, ulmic or geic acid, etc.

from The Century Dictionary and Cyclopedia

  • n. A neutral indifferent substance said by Mulder to exist in black humus.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a black humic substance that is not soluble in water

Etymologies

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