Calipers

Noun

Definition: A measuring instrument with two hinged legs used to measure the diameter or thickness of objects.

Synonyms: Dividers, Compasses

Antonyms: N/a

Examples:

The engineer used calipers to measure the width of the metal sheet.

Mnemonics:

"Calipers have legs like spiders, measuring and gripping objects."

Etymology:

Origin:

The word "caliper" comes from the Latin word "calix" which means "cup" or "goblet." The instrument was initially used by ancient Romans to measure the internal and external diameters of goblets and cups.

Historical Usage:

Calipers have been used as measuring instruments for centuries, and their design and functionality have evolved over time.