Meaning of WORKING SUBSTANCE in English

WORKING SUBSTANCE

transcription, транскрипция: [ noun ]

Date: 1855

: 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)

Merriam-Webster's Collegiate English vocabulary.      Энциклопедический словарь английского языка Merriam Webster.