Definition of cryptodire in US English:

cryptodire

adjective

Zoology
  • = cryptodiran.

noun

Zoology
  • A chelonian of the suborder Cryptodira (which includes most kinds of tortoise, terrapin, and turtle), characterized by retraction of the head directly backwards into the shell by a vertical flexure of the neck.

Origin

Late 19th century; earliest use found in Edward Cope (1840–1897). From scientific Latin Cryptodira, suborder name.

Pronunciation

cryptodire

/ˈkrɪptə(ʊ)dʌɪə/