Chaetodont \Ch[ae]"to*dont\, n. [Gr. ? hair + ?, ?, tooth.] (Zo["o]l.) A marine fish of the family {Ch[ae]todontid[ae]}. The ch[ae]todonts have broad, compressed bodies, and usually bright colors. Chaetodont \Ch[ae]to*dont\, a. Of or pertaining to the Ch[ae]todonts or the family {Ch[ae]todontid[ae]}.