1. The isolated radical of a series of organic compounds.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• alli,
• alle,
• alil,
• allel,
• allie,
• alyl,
• ally,
• aally,
• zllyl,
• sllyl,
• wllyl,
• qllyl,
• wallyl,
• llyl,
• lalyl,
• allyyl,
• cllyl,
• alily,
• allell,
• aillyl

• alalia,
• allele,
• alula.

The adjective form of "allyl" is simply "allylic".

The plural of the "allyl" can be the "allyls".

The singular of the "allyl" can be the "allyl".