nonyl

Relating to or being a hydrocarbon unit, C₉H₁₉, that can occur as a substituent in an organic compound or as an ion or radical.

The hydrocarbon radical, C9H19-, derived from nonane and forming many compounds. Used also adjectively.

Any of very many isomeric univalent hydrocarbon radicals, C9H19, formally derived from nonane by the loss of a hydrogen atom.