The Collaborative International Dictionary
Ligroin
Ligroin \Lig"ro*in\ (l[i^]g"r[-o]*[i^]n), n. A trade name applied somewhat indefinitely to some of the volatile products obtained in refining crude petroleum. It is a complex and variable mixture of several hydrocarbons, generally boils below 170[deg] Fahr., and is more inflammable than safe kerosene. It is used as a solvent, as a carburetant for air gas, and for illumination in special lamps.
Wiktionary
ligroin
n. (context obsolete English) a petroleum fraction boiling 75°-125°C used as a solvent and fuel
Wikipedia
Ligroin
Ligroin is the petroleum fraction consisting mostly of C and C hydrocarbons and boiling in the range 90‒140 ℃; commonly used as a laboratory solvent.