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Webster 1913 Edition

Olefiant

O-le′fi-ant

,
Adj.
[F.
oléfiant
, fr.L.
oleum
oil +
-ficare
(in comp.). Cf.
-Fy
.]
(Chem.)
Forming or producing an oil; specifically, designating a colorless gaseous hydrocarbon called ethylene (olefiant gas).
[Archaic]

Webster 1828 Edition

Olefiant

OLEF'IANT

,
Adj.
[L. oleo, olfacio.] Olefiant gas is a compound of one prime of carbon and one of hydrogen, called by Ure carbureted hydrogen, to distinguish it from the gas resulting from one prime of carbon and two of hydrogen, which he calls subcarbureted hydrogen.
Olefiant gas, is so called from its property of forming with chlorin a compound resembling oil.

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