(definition) by Webster 1913 Wed Dec 22 1999 at 3:57:10

Tro"chal (?), a. [From Gr. a wheel.] Zool.

Resembling a wheel.

Trochal disk Zool., the cephalic disk of a rotifer. It is usually surrounded by a fringe of cilia.

 

© Webster 1913.

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