From WordNet (r) 3.0 (2006): Populus tremula n 1: Old World aspen with a broad much-branched crown; northwestern Europe and Siberia to North Africa [syn: quaking aspen, European quaking aspen, Populus tremula]
Populus tremula n 1: Old World aspen with a broad much-branched crown; northwestern Europe and Siberia to North Africa [syn: quaking aspen, European quaking aspen, Populus tremula]
