trochal disk


Also found in: Dictionary.

trochal disk

[′trō·kəl ‚disk]
(invertebrate zoology)
A flat or funnel-shaped ciliated disk at the anterior end of a rotifer that functions in locomotion and food ingestion.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.