calipers
Meaning
An instrument with two legs, used for measuring the diameter or thickness of something.
A metal support for a person's leg.
Structure
Usage
The engineer used digital calipers to measure the thickness of the metal sheet precisely.
For an accurate reading, ensure the jaws of the calipers are clean and properly zeroed.
He needed a leg caliper to walk after the injury.
Etymology
The word 'calipers' is a 16th-century alteration of 'caliber', which entered English from French. The French term 'calibre' (the diameter of a bullet or bore of a gun) itself traces back to the Arabic 'qālib', meaning a mold or form. The transformation to 'calipers' involved a reinterpretation and the addition of the '-per(s)' suffix, likely influenced by the word 'pair', to denote a measuring instrument composed of two legs or jaws. Thus, the word's journey reflects a shift from a general concept of form or diameter (caliber) to a specific tool designed to measure such dimensions through paired components.
Analysis
- cali: A variant of the root 'calibre' (from French 'calibre', ultimately from Arabic 'qālib', meaning 'mold, form'). - pers: A variant of the plural suffix '-per' (as in 'pair'), indicating a tool consisting of two paired parts.