Risso's dolphin

noun Ris·so's dolphin \ˈri-sōz-\

Definition of Risso's dolphin

  1. :  a dolphin (Grampus griseus) widely distributed in temperate and tropical seas that has a blunt snout, a rounded forehead, and teeth in the lower jaw only Risso's dolphins, which have small mouths and large foreheads, are deep ocean divers that stay offshore and are rarely seen close to shore. — Peter Fimrite —called also grampus

Origin and Etymology of risso's dolphin

after Giuseppe Antonio (Joseph Antoine) Risso †1845 naturalist born in Nice Risso contributed a description and drawing of the dolphin, apparently never published on their own, to the French zoologist Georges Cuvier (1769-1832), who briefly described and illustrated the dolphin on the basis of Risso's account in “Rapport … sur divers Cétacées pris sur les côtes de France …,” Annales du Muséum d'historie naturelle, tome 19 (1812), pp. 12-13 and plate 1 (under the taxonomic name Delphinus griseus). A later synonym was Delphinus rissoanus (1827), on which the current common name may be based.

First Known Use: 1870

Seen and Heard

What made you want to look up Risso's dolphin? Please tell us where you read or heard it (including the quote, if possible).


a trip made at another's expense

Get Word of the Day daily email!