The Collaborative International Dictionary of English v.0.48:

Nipa \Nipa\ prop. n.
   A monotypic genus of palms of Australasia.

   Syn: genus Nipa, Nypa, genus Nypa.
        [WordNet 1.5]

   2. from sap of an Australasian palm.
      [WordNet 1.5]

WordNet (r) 3.0 (2006):

Nipa
    n 1: monotypic genus of palms of Australasia [syn: Nipa,
         genus Nipa, Nypa, genus Nypa]
    2: made from sap of the Australasian nipa palm