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Medical Term:


Pronunciation: per'i-trik'i-da


An order of ciliates (subclass Peritrichia, phylum Ciliophora) characterized by a cylindric shape with the cilia usually limited to the zone surrounding the mouth opening; includes the suborder Mobilina, the members of which are all ectoparasites or endoparasites of aquatic invertebrates and vertebrates, of which the genus Trichodina includes economically significant gill parasites of fish.

[peri- + G. thrix, hair]

© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.