An adult, usually male, who is sexually attracted to prepubescent children. Derived from the Greek paedeia (child) and philos (love.)
Simeon is a pedophile. Every afternoon he walks by the local elementary school, watching the kiddies coming happily bounding out, and there's always an 8-inch bulge in his pants when he does it.
A person who suffers from Pedophilia; that is, an adult who is sexually attracted to children.
Pedophilia is a mental disorder, not a sexual orientation or lifestyle choice. Specifically, it is a Paraphilia. The Paraphilias are characterized by recurrent, intense, sexual urges, fantasies, or behaviors that involve unusual objects, activities, or situations. Other examples of Paraphilias are Exhibitionism, Fetishism, Sexual Masochism, and Sexual Sadism.
Terms like "pedosexual" are misnomers and nothing more than political activism on the part of organized groups of pedophiles attempting to legitimize and legalize their abuse and predation of children.