The Collaborative International Dictionary
Eikosylene
Eikosylene \Ei*kos"y*lene\, n. [Gr. e'i`kosi twenty + acetylene.] (Chem.) A liquid hydrocarbon, C20H38, of the acetylene series, obtained from brown coal.
Wiktionary
eikosylene
n. (context chemistry archaic English) A liquid hydrocarbon, C20H38, of the acetylene series, obtained from lignite.