Definition of propalinal in English:

propalinal

adjective

Zoology
  • Characterized by or involving forward and backward motion, especially of the lower jaw in chewing.

Origin

Late 19th century; earliest use found in Edward Cope (1840–1897). Irregularly from ancient Greek πρό forward + πάλιν backward + -al.

Pronunciation

propalinal

/prəʊˈpalɪnl/