'Cottonweed' definitions:
Definition of 'cottonweed'
From: WordNet
noun
An American everlasting having foliage with soft wooly hairs and corymbose heads with pearly white bracts [syn: pearly everlasting, cottonweed, Anaphalis margaritacea]
noun
Any of various plants of the genus Froelichia found in sandy soils and on rocky slopes in warmer regions of America; grown for their spikes of woolly white flowers