Definition of brachiosaur in English:

Share this entry


Pronunciation: /ˈbrākēəˌsôr/ Pronunciation: /ˈbrak-/
(also brachiosaurus /ˌbrākēəˈsôrəs/ /ˌbrak-/)


A huge herbivorous dinosaur of the late Jurassic to mid Cretaceous periods, with forelegs much longer than the hind legs.
  • Genus Brachiosaurus, infraorder Sauropoda, order Saurischia.
Example sentences
  • They found embedded in solid rock what they believe to be the pelvis of a primitive sauropod, a four-legged, plant-eating dinosaur similar to better-known creatures such as brachiosaurus and diplodocus.
  • As Christians who reject evolutionary theory, the family scoffed at the park's dinosaur attractions, which date the apatosaurus, brachiosaurus and the like to prehistoric times.
  • Apparently, palaeontologists have wondered for years as to why the brachiosaurus didn't collapse under its own weight.



Example sentences
  • To confuse matters even further, it has recently been suggested that Cedarosaurus and some of the Pleurocoelus material is not even brachiosaurian, but titanosaur instead.
  • The reported dorsal vertebra of “Ultrasauros” is not even brachiosaurian but from a diplodocid.


Modern Latin, from Greek brakhiōn 'arm' + sauros 'lizard'.

For editors and proofreaders

Syllabification: bra·chi·o·saur

Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.