Meaning of COAL GAS in English

COAL GAS

noun

: gas made from coal: as

a. : the mixture of gases thrown off by burning coal (as in the furnace of a house)

b. : the gas consisting chiefly of hydrogen and methane made by carbonizing bituminous coal in retorts and used for heating and lighting — see coke-oven gas

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.