Pillow block Meaning, Definition & Usage

  1. noun a cast-iron or steel block for supporting a journal or bearing

WordNet

Definitions
  1. (Mach.), a block, or standard, for supporting a journal, as of a shaft. It is usually bolted to the frame or foundation of a machine, and is often furnished with journal boxes, and a movable cover, or cap, for tightening the bearings by means of bolts; called also pillar block, or plumber block.

Webster 1913