The Collaborative International Dictionary of English v.0.48:
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]WordNet (r) 3.0 (2006):
humic adj 1: of or relating to or derived from humus; "humic acid"