parting line: Meaning and Definition of

part'ing line"

Pronunciation: [key]
— Metall. Metall.
  1. the line at which two closed dies or two halves of a mold meet.
  2. a corresponding line or seam appearing on a molded or cast object.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.