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The Collaborative International Dictionary
Rhigolene

Rhigolene \Rhig"o*lene\, n. [Gr. ??? cold + L. oleum oil.] (Chem.) A mixture of volatile hydrocarbons intermediate between gsolene and cymogene. It is obtained in the purification of crude petroleum, and is used as a refregerant.

Wiktionary
rhigolene

n. (context organic compound English) A mixture of volatile hydrocarbons intermediate between gasolene and cymogene, used as a refrigerant.