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Definition of PID
1. Noun. 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.
Medical Definition of PID
1. See: pelvic inflammatory disease, prolapsed intervertebral disc. (12 Mar 2000)