noun ·4 syllables ·Rare ·Advanced level

Definitions

Noun

1. 1
   One of the largest land animals to ever walk the earth; a Brontosaurus.
2. 2
   huge quadrupedal herbivorous dinosaur common in North America in the late Jurassic wordnet

Synonyms

All synonyms

brontosaurthunder lizardapatosaurapatosaurapatosaurusapatosaurus excelsus

Etymology

From New Latin, from Ancient Greek βροντή (brontḗ, “thunder”) + -saurus.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.