- Fin (Anatomy)
- Extremities (Anatomy)
- Flippers (Anatomy)
Earlier Established Forms
- found: Am. heritage dict. (fin: 1. a membranous appendage extending from the body of a fish or other aquatic animals used for propelling, steering, or balancing a body in the water)
- found: Wikipedia, May 1, 2007 (fin: a surface used to produce lift and thrust or to steer while traveling in water, air, or other fluid media. The first use of the word was for the limbs of fish, but has been extended to include other animal limbs and man-made devices; flippers: various creatures have evolved flippers, for example most fish (although for fish the usual term is fin), as well as certain mammals (whales, pinnipeds) and reptiles (turtles))
- 1986-02-11: new
- 2007-06-01: revised
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