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Wiktionary
alkene

n. (context organic chemistry English) An unsaturated, aliphatic hydrocarbon with one or more carbon–carbon double bonds.

WordNet
alkene

n. any unsaturated aliphatic hydrocarbon [syn: olefine, olefin]

Wikipedia
Alkene

In organic chemistry, an alkene is an unsaturated hydrocarbon that contains at least one carbon–carbon double bond. The words alkene, olefin , and olefine are used often interchangeably (see nomenclature section below). Acyclic alkenes, with only one double bond and no other functional groups, known as mono-enes, form a homologous series of hydrocarbons with the general formula . Alkenes have two hydrogen atoms less than the corresponding alkane (with the same number of carbon atoms). The simplest alkene, ethylene (CH), with the International Union of Pure and Applied Chemistry (IUPAC) name ethene, is the organic compound produced on the largest scale industrially. Aromatic compounds are often drawn as cyclic alkenes, but their structure and properties are different and they are not considered to be alkenes.

Usage examples of "alkene".

Ladies and gentlemen, I give you the portrait of Admiral Alkene, late of the Tholian Assembly!

Rom had shared a rare moment of rapport in their guilty, private pleasure every time Dukat came to the bar with whoever his latest comfort woman was and regaled her with the story of Admiral Alkene, ending with a grandiloquent toast and salute to the mural.