Definition of aetosaur in English:

aetosaur

(also aëtosaur)

noun

Palaeontology
  • Any reptile of the extinct order (or suborder) Aetosauria, known from fossil remains of the Triassic period, and comprising herbivorous diapsids that resembled heavily armoured crocodiles.

Origin

Late 19th century; earliest use found in Isaac Funk (1839–1912), publisher and reformer. From scientific Latin Aëtosaurus, genus name from ancient Greek ἀετός eagle + scientific Latin -saurus.

Pronunciation:

aetosaur

/ˈiːtəsɔː//eɪˈiːtəsɔː/