What is "citral"

n. Either of a pair of terpenoids, geranial and neral, that have the molecular formula C₁₀H₁₆O and are used in perfumery and flavourings.

Citral, or 3,7-dimethyl-2,6-octadienal or lemonal, is either a pair, or a mixture of terpenoids with the molecular formula C H O. The two compounds are double bond isomers. The E-isomer is known as geranial or citral A. The Z-isomer is known as neral or citral B.