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)
WORKING SUBSTANCE
Meaning of WORKING SUBSTANCE in English
Merriam-Webster's Collegiate English vocabulary. Энциклопедический словарь английского языка Merriam Webster. 2003