Definition of promammalian in English:

promammalian

adjective

Zoology
historical
  • Relating to or designating a group of (actual or hypothetical) animals representing the ancestors of mammals, or the most primitive form of mammal.

Origin

Late 19th century; earliest use found in Thomas Huxley (1825–1895), biologist and science educationist. From pro- + mammalian, after scientific Latin Promammalia, plural.

Pronunciation

promammalian

/ˌprəʊmaˈmeɪlɪən//ˌprəʊməˈmeɪlɪən/