The Collaborative International Dictionary
Delphinoidea
Delphinoidea \Del`phi*noi"de*a\, n. pl. [NL.] (Zo["o]l.) The division of Cetacea which comprises the dolphins, porpoises, and related forms. [1913 Webster] ||
Wikipedia
Delphinoidea
Delphinoidea is the largest group of toothed whales with 66 genera in 6 families. The largest living member of the superfamily is the killer whale, which can reach 6 tonnes, while the smallest is Commerson's Dolphin.