Usually means: Longest dinosaur, possibly Diplodocus species.
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We found 10 dictionaries that define the word seismosaurus:

General (9 matching dictionaries)
  1. Seismosaurus, seismosaurus: Oxford Learner's Dictionaries
  2. Seismosaurus: Vocabulary.com
  3. seismosaurus: Wiktionary
  4. seismosaurus: Dictionary.com
  5. Seismosaurus (Zoids), Seismosaurus: Wikipedia, the Free Encyclopedia
  6. Seismosaurus: Rhymezone
  7. seismosaurus: FreeDictionary.org
  8. seismosaurus: Mnemonic Dictionary
  9. Seismosaurus: TheFreeDictionary.com

Science (1 matching dictionary)
  1. Dinosaurs from A-Z (No longer online)

Google, News, Images, Wikipedia, Reddit, BlueSky
Definitions from Wiktionary (seismosaurus)

▸ noun:  A dinosaur, of genus Seismosaurus, from the Jurassic period

Similar:
genus seismosaurus, scelidosaur, megalosaurian, dinosaurian, segnosaur, eustreptospondylus, segnosaurid, neosauropod, hylaeosaur, spinosaurine, more...

Opposite:
microsaurus, nanosaurus, minisaurus

Phrases:
genus seismosaurus, more...

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Similar:
genus seismosaurus, scelidosaur, megalosaurian, dinosaurian, segnosaur, eustreptospondylus, segnosaurid, neosauropod, hylaeosaur, spinosaurine, more...

Opposite:
microsaurus, nanosaurus, minisaurus

Phrases:
genus seismosaurus, more...



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