ˈalə̇l noun
( -s )
Etymology: International Scientific Vocabulary all- (from Latin allium garlic) + -yl — more at allium
1. : an unsaturated univalent radical CH 2 =CHCH 2 — derived from allyl alcohol by removal of the hydroxyl group
2. : isopropenyl — used with an initial Greek beta
β -allyl
• al·lyl·ic əˈlilik, aˈ- adjective