The Collaborative International Dictionary of English v.0.48:

Vinum \Vi"num\, n.; pl. Vina. [L. See Wine.]
   Wine, -- chiefly used in Pharmacy in the name of solutions of
   some medicinal substance in wine; as:

   vina medicata, medicated wines;

   vinum opii, wine of opium.
      [Webster 1913 Suppl.]