Ces*tra"ci*ont (?), n. [Gr. &?; a kind of fish.] (Zoöl.) A shark of the genus Cestracion, and of related genera. The posterior teeth form a pavement of bony plates for crushing shellfish. Most of the species are extinct. The Port Jackson shark and a similar one found in California are living examples.

Ces*tra"ci*ont, a. (Zoöl.) Pertaining to, or characteristic of, the genus Cestracion.