Definition of sycamore
2
: a Eurasian maple (Acer pseudoplatanus) with long racemes of showy yellowish-green flowers that is widely planted as a shade tree
3
: plane entry 4
especially
: a very large spreading tree (Platanus occidentalis) chiefly of the eastern and central U.S. with 3- to 5-lobed broadly ovate leaves
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Merriam-Webster unabridged
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Time Traveler for sycamore
The first known use of sycamore was in the 14th century
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