grampus

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grampus,

name applied to two members of the dolphindolphin,
aquatic mammal, any of the small toothed whales of the family Delphinidae, numbering more than 50 species. These include the true, or beaked, dolphins, the killer whale, the pilot whale, and the freshwater species found in rivers of South America and S and E Asia.
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 family (Delphinidae): Grampus griseus, also known as Risso's dolphin, of worldwide distribution, and Orcinus orca, also known as the killer whalekiller whale,
 orca,
or grampus,
a large, rapacious marine mammal of the dolphin family. Historically considered one species, Orcinus orca,
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grampus

1. a widely distributed slaty-grey dolphin, Grampus griseus, with a blunt snout
2. another name for killer whale