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1930, polymer of vinyl chloride. In chemistry, vinyl was used from 1863 as the name of a univalent radical derived from ethylene, from Latin vinum "wine" (see wine (n.)), because ethyl alcohol is the ordinary alcohol present in wine.
polyvinyl pol·y·vi·nyl (pŏl'ē-vī'nəl)adj. Of, relating to, or characterizing a polymerized thermoplastic vinyl, such as polyvinyl chloride.