trochal disk

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• Trochal disk — Trochal Tro chal, a. [From Gr. ? a wheel.] (Zo[ o]l.) Resembling a wheel. [1913 Webster] {Trochal disk} (Zo[ o]l.), the cephalic disk of a rotifer. It is usually surrounded by a fringe of cilia. [1913 Webster] …   The Collaborative International Dictionary of English

• Trochal — Tro chal, a. [From Gr. ? a wheel.] (Zo[ o]l.) Resembling a wheel. [1913 Webster] {Trochal disk} (Zo[ o]l.), the cephalic disk of a rotifer. It is usually surrounded by a fringe of cilia. [1913 Webster] …   The Collaborative International Dictionary of English