rhigolene

/rig-uh-leen/US // ˈrɪg əˌlin //UK // (ˈrɪɡəʊˌliːn) //

芦笙,芦荟,芦荟胶,芦苇荡

Definitions

n.名词 noun

1
Chemistry.
- : a petroleum distillate intermediate between cymogene and gasoline, formerly used to produce local anesthesia by freezing.

Then, as the temperature rises to 18 C., rhigolene is given off: that is collected and condensed in another vessel.
The lighter and more volatile portions are known under the name of cymogene, rhigolene, gasolene, and naphtha.
Rhigolene is now used in medicine in the form of spray to produce local anæsthesia.