O / ostrăcĭas
noun greek

ostrăcĭas

gen. ae · gender masculine · decl. 1st
and , , , = οστρακίας, ὀστρακῖτις
a semigem; hornstone; chalcedony
a semigem, prob. hornstone or chalcedony, Plin. 37, 10, 65, § 177.