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sea' tur"tle

any of several large turtles of the families Cheloniidae and Dermochelyidae, widely distributed in tropical and subtropical seas, having the limbs modified into paddlelike flippers: all sea turtles are either threatened or endangered through most of their range because of ocean pollution.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

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