Webster's English Dictionary

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dinosaur

di.no.saur \'di--n*-.so.(*)r\ \.di--n*-'so.r-e--*n\ \-'so.r-ik\ n [deriv. 
   of Gk deinos terrible + sauros lizard - more at DIREM, SAURIAN 1: any of a 
   group (Dinosauria) of extinct chiefly terrestrial carnivorous o r 
   herbivorous reptiles 2: any of various large extinct reptiles  - 
   di.no.sau.ri.an ajor ;n