Acording to webster's: The knob-like anterior end of a tapeworm. (In lamen's terms - a tapeworm's ass). Also used as a secret Identity (Mr. Scolex) by Jhonen Vasquez.
"Eeeew, that dude just licked a scolex!"

"Mr. Scolex is so rad!"
by Kennon September 20, 2006
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