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Definition of Quaking aspen
1. Noun. Old World aspen with a broad much-branched crown; northwestern Europe and Siberia to North Africa.
Definition of Quaking aspen
1. Noun. ''Populus tremuloides'', the American aspen, so called from its leaves whose flattened petioles cause them to tremble in the breeze. ¹
¹ Source: wiktionary.com