nine-spot: one of four playing cards in a deck with nine pips on the face
spot: a playing card with a specified number of pips on it to indicate its value
pelvic inflammatory disease: inflammation of the female pelvic organs (especially the Fallopian tubes) caused by infection by any of several microorganisms (chiefly gonococci and chlamydia); symptoms are abdominal pain and fever and foul-smelling vaginal discharge