kəˌrithəˈsȯrəs noun
Usage: capitalized
Etymology: New Latin, from corytho- (from Late Greek korythos crested, from Greek koryth-, korys helmet) + -saurus; akin to Latin cornu horn — more at horn
: a genus of duck-billed dinosaurs (suborder Ornithopoda) having a thin domed bony crest capping the skull and found in Upper Cretaceous formations of western No. America