The Collaborative International Dictionary of English v.0.48:

Platan \Plat"an\, n. [L. platanus. See Plane the tree.]
   [Written also platane.]
   The plane tree. --Tennyson.
   [1913 Webster]

WordNet (r) 3.0 (2006):

platan
    n 1: any of several trees of the genus Platanus having thin pale
         bark that scales off in small plates and lobed leaves and
         ball-shaped heads of fruits [syn: plane tree, sycamore,
         platan]