'black cottonwood' definitions:
Definition of 'black cottonwood'
(from WordNet)
noun
North American poplar with large rounded scalloped leaves and brownish bark and wood [syn: swamp cottonwood, black cottonwood, downy poplar, swamp poplar, Populus heterophylla]
noun
Cottonwood of western North America with dark green leaves shining above and rusty or silvery beneath [syn: black cottonwood, Western balsam poplar, Populus trichocarpa]