noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   The part of the organic matter in soil that does not dissolve in dilute alkali. countable, uncountable
2. 2
   a black humic substance that is not soluble in water wordnet

Synonyms

All synonyms

geic acidhumic acid

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.