a malignant tumor, usually of the skin, appearing primarily in persons with an immunological deficiency
See Kaposi's sarcoma in American Heritage Dictionary 4
(kə-pōˈsēz, kăpˈə-)
noun Abbr. KS
A cancer characterized by numerous bluish-red nodules on the skin, usually on the lower extremities, that is endemic to equatorial Africa and often occurs in a particularly virulent form in people with AIDS.