Meaning of bench screw

bench' screw"

Pronunciation: [key]
— Carpentry. Carpentry.
  1. a wooden or metal screw rotated by a handle fixed to one end within a threaded block fixed to a workbench: used with various jaws to form a vise.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.