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Noun aspen has 1 sense
- aspen - any of several trees of the genus Populus having leaves on flattened stalks so that they flutter in the lightest wind
--1 is a kind of poplar, poplar tree
--1 has particulars: | quaking aspen, European quaking aspen, Populus tremula; American quaking aspen, American aspen, Populus tremuloides; Canadian aspen, bigtooth aspen, bigtoothed aspen, big-toothed aspen, large-toothed aspen, large tooth aspen, Populus grandidentata |
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