Definition of propterygial in US English:

propterygial

adjective

Zoology
  • Of or relating to the propterygium of a fish.

Origin

Late 19th century; earliest use found in Thomas Huxley (1825–1895), biologist and science educationist. From pro- + ancient Greek πτερύγιον fin + -al, after German Propterygium propterygium. Compare slightly later propterygium.

Pronunciation

propterygial

/ˌprɒptəˈrɪdʒɪəl/