genus Platanus ge·nusp·la·tanus uncommon noun 1. genus of large monoecious mostly deciduous trees: London plane; sycamore SynonymsPlatanusgenus Platanus Related words Broader terms rosid dicot genus Parts Platanaceae Part of plane treeLondon planeAmerican sycamoreoriental planeCalifornia sycamoreArizona sycamore WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.