Meaning of piercing saw

pierc'ing saw"

Pronunciation: [key]
— Jewelry. Jewelry.
  1. a small, fine-gauge saw blade with uniformly spaced, angled teeth, inserted in a jeweler's saw frame and used to cut precious metal and such soft materials as ivory and shell.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.