The Collaborative International Dictionary of English v.0.48:
Acer \Acer\ n. 1. 1 type genus of the Aceraceae; trees or shrubs having winged fruit. Syn: genus Acer [WordNet 1.5]WordNet (r) 3.0 (2006):
Acer n 1: type genus of the Aceraceae; trees or shrubs having winged fruit [syn: Acer, genus Acer]