Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun Either of the anterior pair of fins attached to the pectoral girdle of fishes, corresponding to the forelimbs of other vertebrates.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun ichthyology Either of two fins located on each side of a fish just behind the head.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun either of a pair of fins situated just behind the head in fishes that help control the direction of movement

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