Paraffin and polyvinyl resin are often used for scion covering and to protect newly set buds.
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.