[por.poise] n [ME porpoys, fr. MF porpois, fr. ML porcopiscis, fr. L porcus pig + piscis fish--more at farrow, fish] (14c) 1: any of a family (Phocoenidae) of small gregarious toothed whales; esp: a blunt-snouted usu. largely black whale (Phocoena phocoena) of the No. Atlantic and Pacific
5. to
8. feet (1.5 to 2.4 meters) long
2: dolphin 1a