Definition
A compound in which two carbon-carbon p bonds are separated from each other by exactly one s bond.
Explanation
Consisting of Hydrocarbon molecules that have tow different states of carbon double bonds. (represented with double lines)A diene is conjugated when two double bonds are only separated by one carbon-carbon single bond (represented with a single line). You can identify a diene by seeing the formation of the bonds like this: double bond, a single bond, double bond.