The Collaborative International Dictionary of English v.0.48:

Olla \Ol"la\, n. [See Olio.]
   1. A pot or jar having a wide mouth; a cinerary urn,
      especially one of baked clay.
      [1913 Webster]

   2. A dish of stewed meat; an olio; an olla-podrida.
      [1913 Webster]

WordNet (r) 3.0 (2006):

olla
    n 1: leaf or strip from a leaf of the talipot palm used in India
         for writing paper [syn: ola, olla]