Source : Webster's Revised Unabridged Dictionary (1913)

Sycamore \Syc"a*more\, n. [L. sycomorus, Gr. ? the fig mulberry;
   ? a fig + ? the black mulberry; or perhaps of Semitic origin:
   cf. F. sycomore. Cf. {Mulberry}.] (Bot.)
   (a) A large tree ({Ficus Sycomorus}) allied to the common
       fig. It is found in Egypt and Syria, and is the sycamore,
       or sycamine, of Scripture.
   (b) The American plane tree, or buttonwood.
   (c) A large European species of maple ({Acer
       Pseudo-Platanus}). [Written sometimes {sycomore}.]

Source : WordNet®

sycamore
     n 1: variably colored and sometimes variegated hard tough elastic
          wood of a sycamore tree [syn: {lacewood}]
     2: 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}, {platan}]
     3: Eurasian maple tree with pale gray bark that peels in flakes
        like that of a sycamore tree; leaves with five ovate lobes
        yellow in autumn [syn: {great maple}, {scottish maple}, {Acer
        pseudoplatanus}]
     4: thick-branched wide-spreading tree of Africa and adjacent
        southwestern Asia often buttressed with branches rising
        from near the ground; produces cluster of edible but
        inferior figs on short leafless twigs; the Biblical
        sycamore [syn: {sycamore fig}, {mulberry fig}, {Ficus
        sycomorus}]