River dolphin
noun
noun ·Rare ·Advanced level
Definitions
Noun
- 1 Any dolphin that is found only in fresh or brackish water, now considered in one of three superfamilies Platanistoidea, †Lipotoidea, Inioidea, all in parvorder Odontoceti or in a grouping with hippopotamuses.
- 2 any of several long-snouted usually freshwater dolphins of South America and southern Asia wordnet