Webster’s Revised Unabridged Dictionary · 1913 Osteocomma Os′te·o·com′ma, n.; pl. L. Osteocommata (#), E. Osteocommas (#). [NL. See Osteo-, and Comma.] (Anat.) A metamere of the vertebrate skeleton; an osteomere; a vertebra. Owen. ‹ Osteocolla Osteocope ›