vinyl

n. synthetic plastic material made from polymerized resin, group of organic compounds

A vinyl compound is any organic compound that contains a vinyl group (also called ethenyl), −CH=CH2. These are derivatives of ethylene, CH2=CH2, with one hydrogen atom substituted with some other group.A related phrase is vinylidene which stands for the vinyl residue in an organic compound for instance in 1,1-dichloroethene. The vinyl group forms part of the allyl group and is also contained in all acrylates. Many alkenes contain a vinyl group.
See more at Wikipedia.org...

Noun
1. a univalent chemical radical derived from ethylene
(synonym) vinyl group, vinyl radical
(hypernym) group, radical, chemical group
2. shiny and tough and flexible plastic; used especially for floor coverings
(hypernym) plastic

n. vinyl, synthetic plastic material, group of organic compounds

(n.)
The hypothetical radical C2H3, regarded as the characteristic residue of ethylene and that related series of unsaturated hydrocarbons with which the allyl compounds are homologous.