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The Collaborative International Dictionary
deinosaur

Dinosaur \Di"no*saur\, Dinosaurian \Di`no*sau"ri*an\, n. [Gr. ? terrible + ? lizard.] (Paleon.) One of the Dinosauria. [Written also deinosaur, and deinosaurian.] [1913 Webster] ||

Wiktionary
deinosaur

n. (archaic spelling of dinosaur English)