Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun One of one or more unpaired fins on the back of fishes and certain marine mammals.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun A fin located on the backs of
fish and some marinemammals .
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun unpaired median fin on the backs of fishes and some other aquatic vertebrates that help to maintain balance
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