hippopotamus hippopotamoid • Hipposelinum · · · Info · Definitions · Synonyms · Characters · · hippopotamus · · Text Latin · · Script 12 · · Length Definitions · · · (noun) massive thick-skinned herbivorous animal living in or around rivers of tropical Africa. Synonyms: hippo, river horse, Hippopotamus amphibius. · · Noun Definition 1 Synonyms · · · hippo · · Synonym 1 river horse · · Synonym 2 hippopotamus amphibius · · Synonym 3 Characters · · a latin small letter a U+0061 h latin small letter h U+0068 i latin small letter i U+0069 m latin small letter m U+006D o latin small letter o U+006F p latin small letter p U+0070 s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075