American Heritage Dictionary
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Century Dictionary
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GNU Webster's 1913
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WordNet
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Elsewhere on the web
A dolphin and a porpoise were also found dead Wednesday in Brewster, but no further details were available.— News for turnto10.com
Given an abundant source of food and the fact that the porpoise was able to navigate itself to avoid the team's nets, Schoelkopf said that he felt the porpoise was healthy enough and that they wouldn't pursue any further action.— Press of Atlantic City: Editorials
I always fancied that a porpoise was a great fat lumbering sleepy animal, simply because people are accustomed to say "as fat as a porpoise."— My First Voyage to Southern Seas
Well, anyway, it's a porpoise, and a porpoise is a kind of shark, isn't it?— Europe Revised
"This," exclaimed he, "if I mistake not, augurs well; the porpoise is a fat, well-conditioned fish, a burgomaster among fishes; his looks betoken ease, plenty, and prosperity; I greatly admire this round fat fish, and doubt not but this is a happy omen of the success of our undertaking."— Journeys Through Bookland, Vol. 8
Porpoise has been looked up 254 times, favorited once, listed 21 times, and commented on 3 times.

American Heritage Dictionary (1)
Century Dictionary (1)
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