amniota Meaning, Definition & Usage

  1. noun higher vertebrates (reptiles, birds and mammals) possessing an amnion during development

WordNet

Am`ni*o"ta noun plural
Etymology
NL. See Amnion.
Definitions
  1. (Zoöl.) That group of vertebrates which develops in its embryonic life the envelope called the amnion. It comprises the reptiles, the birds, and the mammals.

Webster 1913