The Collaborative International Dictionary
Quindecone
Quindecone \Quin*dec"one\, n. [L. quindecim fifteen.] (Chem.) An unsaturated hydrocarbon, C15H26, of the valylene series, produced artificially as an oily liquid. [Written also quindekone.]
Wiktionary
quindecone
n. (context organic compound English) An unsaturated hydrocarbon related to valylene, probably ''2-undecylbut-1-en-3-yne''