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porpoise

por·poise

porpoise

pronunciation:
por ps
features:
Word History, Word Explorer
part of speech: noun
inflections: porpoise, porpoises
definition 1: any of several sociable aquatic mammals, usu. with a dark back and paler underside, a blunt snout, and a triangular fin on the back.
definition 2: any of several related mammals such as the dolphin.
Word History
Porpoise comes from a French word that means "pig fish."
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See
  mammal, ocean