Source : Webster's Revised Unabridged Dictionary (1913)

Cavicornia \Cav`i*cor"ni*a\ (k[a^]v`[i^]*k[^o]r"n[i^]*[.a]), n.
   pl. [NL.] (Zo["o]l.)
   A group of ruminants whose horns are hollow, and planted on a
   bony process of the front, as the ox.