\Ces*tra"ci*ont\, n. [Gr. ? a kind of fish.]
(Zo["o]l.)
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. (Zo["o]l.)
Pertaining to, or characteristic of, the genus {Cestracion}.