plumb bob

noun

1. plummet ( def 1 ).

plumb bob

noun

1. the weight, usually of lead, at the end of a plumb line; plummet

Word History and Origins

Origin of plumb bob¹

First recorded in 1825–35

Example Sentences

And at last he was dangling at the end of the rope like a plumb-bob.

From Project Gutenberg

He thought that a plumb bob dropped through the long axis of the rocket would form a right angle with the surface of Arzachel.

From Project Gutenberg

With a tape line, gimlet, and plumb-bob, a mechanic is fully equipped with tools to get his measurements.

From Project Gutenberg

A plumb bob must be attached exactly in the center of the tripod head.

From Project Gutenberg

Our surveying apparatus was a triangle and a plumb bob which we made ourselves.

From Project Gutenberg