Definition of rhipidistian in English:

rhipidistian

adjective

  • Of or relating to the group Rhipidistia of extinct lobe-finned fishes, known from fossil remains of the Devonian, Carboniferous, and early Permian periods, and now usually regarded as the ancestors of all tetrapods.

noun

  • A rhipidistian fish.

Origin

Early 20th century; earliest use found in Annals of the New York Academy of Science. From scientific Latin Rhipidistia, group name (E. D. Cope 1887, in Amer. Naturalist 211017; from ancient Greek ῥιπίδ-, ῥιπίς fan + ἱστίον sail + scientific Latin -a) + -an.

Pronunciation

rhipidistian

/ˌrɪpɪˈdɪstɪən/