Adjective
sulfenic (not comparable)
(chemistry) Of or pertaining to sulfenic acid or its derivatives.
A specific sulfenic acid, 1-propenesulfenic acid, is rapidly acted on by a second enzyme, the lacrimatory factor synthase (LFS), producing the syn-propanethial-S-oxide. Source: Internet
The more often one chops onions, the less one experiences eye irritation. citation The amount of sulfenic acids and LF released and the irritation effect differs among Allium species. Source: Internet