/nooh'meuh sis"tis, nyooh'-/ , Pathol.
a pulmonary infection caused by the protozoan Pneumocystis carinii, occurring as an opportunistic disease in persons with impaired immune systems, as AIDS victims. Abbr.: PCP Also called pneumocystis carinii pneumonia /keuh ruy"nee uy'/ .
[ 1980-85; pneumocystis ]