apatosaurus apatosaur • Apatosaurus · · · Info · Definitions · Synonyms · Characters · · apatosaurus · · Text Latin · · Script 11 · · Length 6 · · Syllables Definitions · · · (noun) huge quadrupedal herbivorous dinosaur common in North America in the late Jurassic. Synonyms: apatosaur, brontosaur, brontosaurus, thunder lizard, Apatosaurus excelsus. · · Noun Definition 1 Synonyms · · · apatosaur · · Synonym 1 brontosaur · · Synonym 2 brontosaurus · · Synonym 3 thunder lizard · · Synonym 4 apatosaurus excelsus · · Synonym 5 Characters · · a latin small letter a U+0061 o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075