/ Dictionary / Index P peritrichous: Meaning and Definition of Find definitions for: pe•rit•ri•chous Pronunciation: (pu-ri'tri-kus), [key] — adj. (of bacteria) having a uniform distribution of flagella over the body surface. (of certain protozoans) having cilia arranged spirally around the mouth. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: peritrichous (Thesaurus) peritrichate perivisceral Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language