nounC2Very rare — outside the 30,000 commonest English words, so you will meet it in writing rather than in speechToo rare in one of the two pools to compare — fewer than 20 uses in speech or in writing
A dinosaur with a double row of plates standing along its back.
Definitions of stegosaurus
1nounstegosaurusA dinosaur with a double row of plates standing along its back.C2