Platanus pla·ta·nus uncommon noun 1. genus of large monoecious mostly deciduous trees: London plane; sycamore Synonymsgenus Platanus Related words Word family Platanus acerifoliaPlatanus occidentalisPlatanus orientalisPlatanus racemosaPlatanus wrightii 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.