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n. pl. per·i·trichs also pe·rit·ri·cha (pə-rĭt′rĭ-kə)
Any of various protozoans, such as the vorticella, having a wide oral opening surrounded by cilia.

[From New Latin Peritrichida, former order name : peri- + Greek thrix, trikh-, hair.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


pl n, sing peritrich (ˈpɛrɪˌtrɪk)
1. (Zoology) ciliate protozoans, of the order Peritrichida, in which the cilia are restricted to a spiral around the mouth
2. (Microbiology) bacteria having the entire cell surface covered with flagella
[C19: from New Latin, from peri- + Greek thrix hair]
peˈritrichous adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
turrida B Pf, Bt (Ehrenberg, 1838) 16 Euplotes affinis B-D Bt (Dujardin, 1842) 17 Oxytricha fallax B Pl, Bt (Stein, 1859) 18 Stentor roeseli B, P Bt (Ehrenberg, 1835) Class Peritricha 19 Epistylis B Pf thienemanni (Nenninger, 1948) 20 Opercularia B Pf coarctata (Claparede et Lachmann, 1858) 21 Vorticella alba B-D Pf (Fromentel, 1874) 22 V.
A taxonomic study of sessile peritrichs (Ciliophora: Peritricha) associated with crustacean fish ectoparasites in South Africa.
Ciliates of the genera Trichodinella, Tripartiella and Paratrichodina (Peritricha, Mobilina) invading fish gills.