noun🔗ShareAmniotesAny of the Amniota group of vertebrates having an amnion during the development of the embryo; mammals, birds and reptiles."Because their embryos develop inside protective membranes, including the amnion, humans, chickens, and lizards are all considered amniotes. "Parce que leurs embryons se développent à l'intérieur de membranes protectrices, dont l'amnios, les humains, les poulets et les lézards sont tous considérés comme des amniotes.organismanimalbiologyscienceChat with AIVocabulary GamePractice Reading