pter·an·o·don \-ˈranəˌdän\noun Etymology: New Latin, from pter- + Greek anodont-, anodōn toothless, from an- + odōn tooth — more at tooth 1.capitalized: a genus of Cretaceous pterosaurs having a long toothless beak, a backwardly directed bony crest on the skull, and a wingspread of up to 25 feet 2.-s: any pterosaur of Pteranodon or a closely related genus