One of the mysteries of the English language finally explained.
Zoology. In the shell of a bivalve: designating a type of hinge in which a series of teeth on one valve are inserted into a corresponding series of sockets in the other.
A prionodont bivalve.
Late 19th century; earliest use found in William Healey Dall (1845–1927), natural historian, paleontologist, and malacologist. From ancient Greek πριον-, πρίων a saw + -odont.
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