Definition of river wolf in US English:

river wolf

noun

  • 1A pike (genus Esox).

  • 2The giant otter, Pteronura brasiliensis, of South American rainforests.

Origin

Mid 17th century; earliest use found in Thomas Moffett (1553–1604), physician and naturalist. From river + wolf.

Pronunciation

river wolf

/ˈrɪvə wʊlf/