The Collaborative International Dictionary of English v.0.48:

Farinose \Far`i*nose"\, a. [L. farinosus: cf. F. farineux.]
   1. Yielding farina; as, farinose substances.
      [1913 Webster]

   2. (Bot. & Zool.) Covered with a sort of white, mealy powder,
      as the leaves of some poplars, and the body of certain
      insects; mealy.
      [1913 Webster]