Usually means: Large herbivorous dinosaur with long neck.
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We found 16 dictionaries that define the word brontosaur:

General (15 matching dictionaries)
  1. brontosaur: Merriam-Webster
  2. brontosaur: Oxford Learner's Dictionaries
  3. brontosaur: American Heritage Dictionary of the English Language
  4. brontosaur: Collins English Dictionary
  5. brontosaur: Vocabulary.com
  6. brontosaur: Wordnik
  7. brontosaur: Wiktionary
  8. brontosaur: Webster's New World College Dictionary, 4th Ed.
  9. brontosaur (brontosaurus): The Wordsmyth English Dictionary-Thesaurus
  10. brontosaur: Infoplease Dictionary
  11. brontosaur: Dictionary.com
  12. brontosaur: Rhymezone
  13. brontosaur: FreeDictionary.org
  14. brontosaur: Mnemonic Dictionary
  15. brontosaur: TheFreeDictionary.com

Computing (1 matching dictionary)
  1. brontosaur: Encyclopedia

(Note: See brontosaurs as well.)

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Definitions from Wiktionary (brontosaur)

▸ noun:  Any member of the genus Brontosaurus.

Similar:
apatosaurus, thunder lizard, brontosaurus, apatosaur, apatosaurus excelsus, brontotheriid, brachiosaur, brontothere, brachiosaurid, brontotherid, more...

Opposite:
apatosaur, diplodocus, sauropod

▸ Words similar to brontosaur

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Similar:
apatosaurus, thunder lizard, brontosaurus, apatosaur, apatosaurus excelsus, brontotheriid, brachiosaur, brontothere, brachiosaurid, brontotherid, more...

Opposite:
apatosaur, diplodocus, sauropod



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