hydrogen gas
English
Noun
hydrogen
gas
(
uncountable
)
(
obsolete
,
chemistry
)
hydrogen
Synonyms
hydrogen air
References
James A. H. Murray
et al.
, editors (
1884–1928
), “Hydrogen gas”, in
A New English Dictionary on Historical Principles
(
Oxford English Dictionary
), London:
Clarendon Press
,
→OCLC
.