working fluid

noun

: a fluid working substance

Examples of working fluid in a Sentence

Recent Examples on the Web

To harness the small temperature differential, most groups generate power by heating and cooling a working fluid that naturally boils at a low temperature, such as ammonia. — IEEE Spectrum, 10 Sep. 2026

Engines that convert heat into work typically operate in cycles, allowing a working fluid to absorb heat, expand, and drive a turbine. — Aman Kumar, Encyclopedia Britannica, 18 June 2026

The Carbon One project uses carbon dioxide in a supercritical state as its working fluid. — Georgina Jedikovska, Interesting Engineering, 1 June 2026

This may not completely eliminate the need for some sort of working fluid to transfer heat over longer distances. — John Timmer, Ars Technica, 9 May 2024

Word History

First Known Use

1878, in the meaning defined above

Rhymes for working fluid

• druid
• superfluid