The Collaborative International Dictionary
Nonylene
Nonylene \Non"y*lene\, n. [Nonane + ethylene.] (Chem.) Any one of a series of metameric, unsaturated hydrocarbons C9H18 of the ethylene series.
Wiktionary
nonylene
n. (context chemistry English) Any of a series of metameric unsaturated hydrocarbons, C9H18, of the ethylene series.