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]