Definitions

1. adjective

relating to or derived from isobutane or isobutylene.

“The isobutyl group is a common functional group in organic chemistry.”

2. noun

a compound derived from isobutane or isobutylene.

“Isobutyl alcohol is a flammable liquid with a strong odor.”

3. adverb

in relation to isobutane or isobutylene.

“The isobutyl compound is produced through a reaction process.”