The Collaborative International Dictionary of English v.0.48:

Palmyra \Pal*my"ra\, n. (Bot.)
   A species of palm (Borassus flabelliformis) having a
   straight, black, upright trunk, with palmate leaves. It is
   found native along the entire northern shores of the Indian
   Ocean, from the mouth of the Tigris to New Guinea. More than
   eight hundred uses to which it is put are enumerated by
   native writers. Its wood is largely used for building
   purposes; its fruit and roots serve for food, its sap for
   making toddy, and its leaves for thatching huts.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

lontar \lontar\ n.
   A tall fan palm (Borassus flabellifer) of Africa and India
   and Malaysia yielding a hard wood and sweet sap that is a
   source of palm wine and sugar; the palmyra; -- its leaves
   are used for thatching and weaving.

   Syn: palmyra, palmyra palm, toddy palm, wine palm, longar
        palm, Borassus flabellifer.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

palmyra
    n 1: tall fan palm of Africa and India and Malaysia yielding a
         hard wood and sweet sap that is a source of palm wine and
         sugar; leaves used for thatching and weaving [syn:
         palmyra, palmyra palm, toddy palm, wine palm,
         lontar, longar palm, Borassus flabellifer]