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working substance

noun
1.
a substance, usually a fluid, that undergoes changes in pressure, temperature, volume, or form as part of a process for accomplishing work.
Origin of working substance
1895-1900
1895-1900
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for working substance
Historical Examples
  • We can obtain another important result for the case of the working substance in two phases from equation (B).

    Lord Kelvin Andrew Gray
British Dictionary definitions for working substance

working substance

noun
1.
the fluid, esp water, steam, or compressed air, that operates an engine, refrigerator, etc
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Difficulty index for working substance

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Word Value for working

15
17
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