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pectoral fin

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pectoral fin

–noun
(in fishes) either of a pair of fins usually situated behind the head, one on each side, and corresponding to the forelimbs of higher vertebrates.


Origin:
1760–70
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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pectoral fin  
n.  Either of the anterior pair of fins attached to the pectoral girdle of fishes, corresponding to the forelimbs of higher vertebrates.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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