Pil'lōw-blŏck, n.

noun

n. (Mech.) A block, or standard, for supporting the end of a shaft. It is usually bolted to the frame or foundation of a machine, and is furnished with bearings of brass or wood for diminishing the friction of the shaft, and a cap, for tightening the bearings by means of screws; a journal-box; — called also plumber-box.

A technical drawing of a central hatched circular component inside an octagonal housing, mounted on a base with supports on either side.