1. Form of sexual perversion in which the infliction or the experiencing of pain increases the pleasure of the sexual act or causes sexual pleasure independent of the act; includes both sadism (q.v.) and masochism (q.v.).
The definition information for algophilia is provided by Stedman's. You can search our medical dictionary here.
Stedman's, part of Lippincott Williams & Wilkins, provides a comprehensive line of health-science publications for healthcare professionals and medical students.