Any of various deciduous trees of the genus Platanus, especially P. occidentalis of eastern North America, having palmately lobed leaves, ball-like, nodding, hairy fruit clusters, and bark that flakes off in large colorful patches. Also called buttonball, buttonwood.
A Eurasian deciduous maple tree (Acer pseudoplatanus) having palmately lobed leaves, winged fruits, and greenish flowers.
A fig tree (Ficus sycomorus) of Africa and adjacent southwest Asia, mentioned in the Bible, having clusters of figs borne on short leafless twigs.
[Middle English sicamour, a kind of fig tree, from Old French sicamor, from Latin sȳcomorus, from Greek sūkomoros, perhaps of Semitic origin; see šqm in Semitic roots.]
(bŭt'n-bôl') 
ənˌbɔl