bron`to*saur"(), n. [NL., fr. Gr. bronth` thunder + say^ros lizard.] (Paleon.) a dinosaur of the genus Brontosaurus; an individual may also be called a brontosaurus or an apatosaurus.
Bron`to*sau"rus(), n. [NL., fr. Gr. bronth` thunder + say^ros lizard.] (Paleon.) A genus of large sauropod American dinosaurs of the jurassic era, or an individual of that genus. A length of sixty feet is believed to have been attained by these reptiles. The genus is also called Apatosaurus, and individuals of the genus are also called brontosaurs.
[1913 Webster +PJC]
Bron`to*the"ri*um(), n. [NL., fr. Gr. thunder + beast.] (Paleon.) A genus of large extinct mammals from the miocene strata of western North America. They were allied to the rhinoceros, but the skull bears a pair of powerful horn cores in front of the orbits, and the fore feet were four-toed. See Illustration in Appendix.
Bron`to*zo"um(), n. [NL., fr. Gr. thunder + animal.] (Paleon.) An extinct animal of large size, known from its three-toed footprints in Mesozoic sandstone.
The tracks made by these reptiles are found eighteen inches in length, and were formerly referred to gigantic birds; but the discovery of large bipedal three-toed dinosaurs has suggested that they were made by those reptiles.
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Fri 28th February 2020