vinylogous

adjective2

1. •
   Of, pertaining to or containing a vinyl group, specifically used to describe functional groups in which the standard moieties of the group are separated by a carbon–carbon double bond.

   • Aldrichimica Acta Volume 30 No 4 (pdf) from Sigma-Aldrich Bulky electron-withdrawing groups can cause the vinylogous portion of the vinylcarbenoid to become the active electrophilic site, but usually the use of nonpolar solvents can minimize this type of reactivity.
2. •
   Describing a homologue of a vinyl compound