Where does “Dinosauria” come from?

Dinosauria (Latin) comes from Ancient Greek δεινός, from Ancient Greek ὄνυξ, from Proto-Indo-European h₃nogʰ- — claw, nail; nail.

Ancestry of “Dinosauria”, step by step

StepLanguageWordMeaning
1Ancient Greekδεινόςterrible, horrible, fearful, astounding; danger;...
2Ancient Greekὄνυξclaw, nail, hoof, talon; Anything which resembles...
3Proto-Indo-Europeanh₃nogʰ-claw, nail; nail

Words derived from “Dinosauria”

Every word from Proto-Indo-European h₃nogʰ- →Every word from Ancient Greek ὄνυξ →Every word from Ancient Greek δεινός →