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Definition of edmontosaurus
edmontosaurus
/ɛdˌmɒntəˈsɔːrəs/
ed · mon · to · sau · rus
Plural:edmontosauruses
edmontosaurus Lexical Profile
CEFR
C2
Grade
6
Tier
3
Usage
Rare
• noun
1
A genus of large, duck-billed herbivorous dinosaur (hadrosaur) that lived in western North America during the Late Cretaceous period, distinguished by its wide, flattened snout and the absence of a bony cranial crest.
Synonyms
View all synonyms for edmontosaurus• Rhymes for edmontosaurus
Word Origin & Etymology
Coined in 1917 by paleontologist Lawrence Lambe. The name derives from the Edmonton Formation (now known as the Horseshoe Canyon Formation) in Alberta, Canada, where the first type specimens were discovered, combined with the Greek word 'sauros', meaning lizard.
Usage Trend
Historical frequency of usage in published text.
180019102020
Data source: Google Books Ngram Viewer
Cite this Entry
Wordmom. (2026). Definition of Edmontosaurus. In Wordmom Dictionary. Retrieved Oct 18, 2026, from https://wordmom.com/dictionary/edmontosaurus