gephyrocercal

gephyrocercal

[¦jėf·ə·rō¦sər·kəl]
(vertebrate zoology)
Having the dorsal and anal fins coming together smoothly at the aborted end of the vertebral column of a fish's tail.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.