hadrosauridae hadrosaur • hadrosaurus · · · Info · Definitions · Characters · · hadrosauridae · · Text Latin · · Script 13 · · Length 5 · · Syllables Definitions · · · (noun) duck-billed dinosaurs; upper Cretaceous. Synonyms: Hadrosauridae, family Hadrosauridae. · · Noun Definition 1 Characters · · a latin small letter a U+0061 d latin small letter d U+0064 e latin small letter e U+0065 h latin small letter h U+0068 i latin small letter i U+0069 o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073 u latin small letter u U+0075