etherin

from The Century Dictionary.

• noun In chem., a polymeric form of ethylene which separates in transparent, tasteless crystals from heavy oil of wine. Also called concrete oil of wine.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Chem.) A white, crystalline hydrocarbon, regarded as a polymeric variety of ethylene, obtained in heavy oil of wine, the residue left after making ether; -- formerly called also concrete oil of wine.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun organic chemistry A white crystalline hydrocarbon, regarded as a polymeric variety of ethylene, obtained in heavy oil of wine, the residue left after making ether.