Source : Webster's Revised Unabridged Dictionary (1913)

Pomacentroid \Po`ma*cen"troid\, a. [Gr. ? a cover + ? a prickle
   + -oid.] (Zo["o]l.)
   Pertaining to the {Pomacentrid[ae]}, a family of
   bright-colored tropical fishes having spiny opercula; --
   often called {coral fishes}.