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tailfin
Variant of tail fin
noun
- a fixed or adjustable fin on the rear of a rocket, car, etc.sometimes written tailfin
noun
- Zool. a movable fin that forms the tail of a fish, the fluke of a whale, etc.
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.