proaladj.

Brit.

/ˈprəʊəl/, U.S.

/ˈproʊəl/

Origin: A borrowing from Greek, combined with an English element. Etymons: Greek πρό , -al suffix¹.

Etymology: Irregularly < ancient Greek πρό forward (see pro- prefix²) + -al suffix¹. Compare palinal adj., propalinal adj.

Zoology.

Characterized by or involving movement from back to front, esp. of the lower jaw in mastication. Contrasted with palinal. Cf. propalinal adj.

ΚΠ

1888 E. D. Cope in Amer. Naturalist 22 7 (note) The propalinal mastication is to be distinguished into the proal, from behind forwards,..and the palinal, from before backwards.

1982 Paleobiology 8 267/2 Proal—from back to front; and palinal—from front to back.

1995 Nature 24 Aug. 678 It indicates back-to-front (proal) motion of the mandible produced by the posterior pterygoid muscle during jaw closing, much as in the extant tuatara, Sphenodon.

This entry has been updated (OED Third Edition, June 2007; most recently modified version published online March 2022).

单词	proal
释义	proaladj. Brit. /ˈprəʊəl/, U.S. /ˈproʊəl/ Origin: A borrowing from Greek, combined with an English element. Etymons: Greek πρό , -al suffix¹. Etymology: Irregularly < ancient Greek πρό forward (see pro- prefix²) + -al suffix¹. Compare palinal adj., propalinal adj. Zoology. Characterized by or involving movement from back to front, esp. of the lower jaw in mastication. Contrasted with palinal. Cf. propalinal adj. ΚΠ 1888 E. D. Cope in Amer. Naturalist 22 7 (note) The propalinal mastication is to be distinguished into the proal, from behind forwards,..and the palinal, from before backwards. 1982 Paleobiology 8 267/2 Proal—from back to front; and palinal—from front to back. 1995 Nature 24 Aug. 678 It indicates back-to-front (proal) motion of the mandible produced by the posterior pterygoid muscle during jaw closing, much as in the extant tuatara, Sphenodon. This entry has been updated (OED Third Edition, June 2007; most recently modified version published online March 2022). < adj.1888
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