Definition of working substance
: 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)
Keep scrolling for more
Comments on working substance
What made you want to look up working substance? Please tell us where you read or heard it (including the quote, if possible).
Test Your Vocabulary
Slippery Words Quiz—Changing with the Times
- What is an earlier meaning of nice?
Test your vocabulary with our 10-question quiz!
TAKE THE QUIZ
Spell words. Make bears.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridgedWords at Play
Ask the Editors
Word Games
- Slippery Words Quiz—Changing with the Times
Do you know these earlier meanings of words?
Take the quiz - Words of Snow and Ice Quiz
A selection of words from the chillier parts of t...
Take the quiz - How Strong Is Your Vocabulary?
Test your vocabulary with our 10-question quiz!
Take the quiz - Play the game
Share working substance
Time Traveler for working substance
The first known use of working substance was in 1855
See more words from the same year