What does triene mean?
Triene is a specialized organic-chemistry term for a hydrocarbon or hydrocarbon group containing three carbon–carbon double bonds. The suffix -ene identifies an unsaturated hydrocarbon, while the prefix tri- indicates that there are three such bonds. In systematic names, triene appears within longer terms such as octadecatrienoic acid, where it describes a fatty-acid chain rather than a separate molecule. A triene may have its double bonds conjugated, meaning that they form an alternating system of single and double bonds, or isolated, with saturated sections separating them. Because triene follows standard alkene nomenclature, it is normally a technical term in chemistry, biochemistry, and materials science rather than everyday vocabulary. Its value is precision: it immediately identifies the number of carbon–carbon double bonds, whereas the broader phrase unsaturated hydrocarbon does not. This distinction matters when discussing fatty acids, cyclic hydrocarbons, and reactions involving hydrogenation or oxidation.
nounA hydrocarbon or hydrocarbon group containing three carbon–carbon double bonds.
- A hydrocarbon or hydrocarbon group containing three carbon–carbon double bonds.
"Each molecule of linolenic acid contains a triene chain with three carbon–carbon double bonds."
"Each molecule of linolenic acid contains a triene chain with three carbon–carbon double bonds."
"In the product name octadecatrienoic acid, triene indicates that the fatty-acid chain has three double bonds."
The plural is used for multiple hydrocarbons or hydrocarbon groups, each containing three carbon–carbon double bonds.
"Several conjugated trienes were identified in the sample."
Triene is essentially an alkane with three pairs of hydrogen atoms removed—one more double bond than diene.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does triene come from?
Triene was formed in English by combining the prefix tri-, meaning “three,” with the chemical suffix -ene, which marks an unsaturated hydrocarbon. The prefix comes through Latin from Greek tri-, ultimately associated with the Indo-European word for “three.” The name follows the same systematic pattern as alkene and diene, with the numerical prefix specifying the number of double bonds.
How triene is actually used
This is a specialist term used in organic chemistry, biochemistry, and related fields. It is uncommon in general prose and specifically counts carbon–carbon double bonds rather than indicating general unsaturation.