heterocercal


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heterocercal

[¦hed·ə·rō¦sər·kəl]
(vertebrate zoology)
Pertaining to the caudal fin of certain fishes and indicating that the upper lobe is larger, with the vertebral column terminating in this lobe.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.