Source : Webster's Revised Unabridged Dictionary (1913)

Pina \Pi`[~n]a\, n. [Sp., orig., pineapple, pine cone.]
   1.
      (a) The pineapple.
      (b) Pi[~n]a cloth or the fiber of which it is made.

   2. Also

Pina \Pi"na\ (pron. also ?). (Metal.)
   A cone of silver amalgam prepared for retorting; also, the
   residuary cone of spongy silver left after the retorting.