working substance
noun
: a usually fluid substance that through changes of temperature, volume, and pressure is the means of carrying out thermodynamic processes or cycles (as in a heat engine)
Word History
First Known Use
1855, in the meaning defined above
Time Traveler
The first known use of working substance was
in 1855
Dictionary Entries Near working substance
Cite this Entry
“Working substance.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/working%20substance. Accessed 11 Dec. 2023.
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