terrapin

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terrapin

(tĕr`əpĭn), name for several edible turtlesturtle,
a reptile of the order Chelonia, with strong, beaked, toothless jaws and, usually, an armorlike shell. The shell normally consists of bony plates overlaid with horny shields.
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 of fresh or brackish water.

terrapin

[′ter·ə·pən]
(vertebrate zoology)
Any of several North American tortoises in the family Testudinidae, especially the diamondback terrapin.

terrapin

any of various web-footed chelonian reptiles that live on land and in fresh water and feed on small aquatic animals: family Emydidae