lithophagous

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.

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