• (a.) Pertaining to the Pomacentridae, a family of bright-colored tropical fishes having spiny opercula; -- often called coral fishes.
Po`ma·cen'troid adjective [ Greek ... a cover + ... a prickle + -oid .] (Zoology) Pertaining to the Pomacentridæ , a family of bright-colored tropical fishes having spiny opercula; -- often called coral fishes .