GNU Collaborative International Dictionary of English

Found one definition

1.       
   ‖Ostracion (?), prop. n. [NL., fr. Gr. ὀστράκιον small shell.] (Zool.) A genus of plectognath fishes of the family Ostraciontidae having the body covered with solid, immovable, bony plates. It includes the trunkfishes (also called boxfish).
   
   [1913 Webster +PJC]