terrapin

noun4

1. •
   Any of several small turtles of the families Emydidae and Geoemydidae found throughout the world.
2. •
   Any of several small turtles native to North America that live in brackish or fresh water, especially the diamondback terrapin (Malaclemys terrapin).
3. •
   (no longer used) The flesh of such a turtle used as food.

   • The man who did not eat twice of terrapin would be held in small repute, as the Londoner is held who at a city banquet does not partake of both thick and thin turtle. — 1862
4. •
   (no longer used) Any turtle.

   • The third service was made up of a loin of fresh pork with apple-sauce, a kid smothered with onions, and a terrapin baked in the shell; […] — 1751