Source : Webster's Revised Unabridged Dictionary (1913)

Clathrate \Clath"rate\ (kl[a^]th"r[asl]t), a. [L. clathri
   lattice, Gr. klh,qra.]
   1. (Bot.) Shaped like a lattice; cancellate. --Gray.

   2. (Zo["o]l.) Having the surface marked with raised lines
      resembling a lattice, as many shells.

Source : WordNet®

clathrate
     adj 1: having a latticelike structure pierced with holes or windows
            [syn: {cancellate}, {cancellated}]
     2: designating or relating to a compound in which one component
        is physically enclosed within the crystal structure of
        another