lithophagous

From litho- +‎ -phagous.

lithophagous (not comparable)

1. (zoology) Eating or swallowing stones or gravel, often as an aid to digestion.

   The ostrich is lithophagous.

2. (zoology) Eating, destroying, or burrowing into stone, like some mollusks, sponges, annelids, and sea urchins.

• lithophagy

• gastrolith
• Lithodomus
• pholad borings

• “lithophagous”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.