/ Dictionary / Index P psittacosis: Meaning and Definition of Find definitions for: psit•ta•co•sis Pronunciation: (sit"u-kō'sis), [key] — n. Pathol. a rickettsial disease affecting birds of the parrot family, pigeons, and domestic fowl, caused by the chlamydia Chlamydia psittaci and transmissible to humans. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: psittacosis (Thesaurus) psittacism Pskov Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language