A tree with leaves divided into five parts and seeds that turn around slowly to the ground when they fall. (Cambridge Dictionary)
A large Eurasian maple with winged fruits, native to central and southern Europe. It is planted as a fast-growing ornamental but tends to displace native trees. (Oxford Dictionaries)
A sycamore or a sycamore tree is a tree that has yellow flowers and large leaves with five points. (Collins Dictionary)
Sycamore. Collins Dictionary.