The Collaborative International Dictionary of English v.0.48:

geic \ge"ic\ (j[=e]"[i^]k), a. [Gr. gh^ earth.] (Chem.)
   Pertaining to, or derived from, earthy or vegetable mold.
   [1913 Webster]

   geic acid. (Chem.) See Humin.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

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, gein, ulmic or geic acid, etc.
   [1913 Webster]