LITHOPHAGOUS
a.[Gr. stone, and to eat. ] Eating or swallowing stones or gravel, as the ostrich.
Li *thoph "a *gous, a. Etym: [Litho- + Gr. (Zoöl.)(a ) Eating or swallowing stones or gravel, as the ostrich. (b ) Eating or destroying stone; -- applied to various animals which make burrows in stone, as many bivalve mollusks, certain sponges, annelids, and sea urchins. See Lithodomus.
The Wordsmith Dictionary
The Wordsmith Dictionary