Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Relating to, designating, or characterized by a tail fin having two symmetrical lobes extending from the end of the vertebral column, as in most bony fishes.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Describing the symmetric tail of a fish that has two lobes extending from the end of the vertebral column.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Having the tail nearly or quite symmetrical, the vertebral column terminating near its base; -- opposed to heterocercal.

from The Century Dictionary and Cyclopedia

  • In ichthyology, having the caudal fin symmetrical as to its upper and under halves: opposed to heterocercal. See heterocercal, diphycercal, hypural.

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

  • adj. possessing a symmetrical tail that extends beyond the end of the vertebral column (as in most bony fishes)

Etymologies

homo- + Greek kerkos, tail + -al1.
(American Heritage® Dictionary of the English Language, Fourth Edition)

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