Source : Webster's Revised Unabridged Dictionary (1913)

Plane tree \Plane" tree`\ (Bot.)
   Same as 1st {Plane}.

Source : WordNet®

plane tree
     n : 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: {sycamore}, {platan}]