penguin

[ peng-gwin, pen- ]
/ ˈpɛŋ gwɪn, ˈpɛn- /

noun Ornithology.

any of several flightless, aquatic birds of the family Spheniscidae, of the Southern Hemisphere, having webbed feet and wings reduced to flippers.
Obsolete. great auk.

Origin of penguin

1570–80; origin uncertain; perhaps < Welsh pen gwyn literally, white head (referring to the great auk in its winter plumage); later misapplied to the Spheniscidae
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British Dictionary definitions for penguin

penguin

/ (ˈpɛŋɡwɪn) /

noun

any flightless marine bird, such as Aptenodytes patagonica (king penguin) and Pygoscelis adeliae (Adélie penguin), of the order Sphenisciformes of cool southern, esp Antarctic, regions: they have wings modified as flippers, webbed feet, and feathers lacking barbsSee also emperor penguin, king penguin
an obsolete name for great auk

Word Origin for penguin

C16: perhaps from Welsh pen gwyn, from pen head + gwyn white
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012