Gram·pus n.; pl. Grampuses
 1. Zool. A toothed delphinoid cetacean, of the genus Grampus, esp. G. griseus of Europe and America, which is valued for its oil. It grows to be fifteen to twenty feet long; its color is gray with white streaks. Called also cowfish. The California grampus is G. Stearnsii.
 2. A kind of tongs used in a bloomery. [U.S.]
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