Any of various plants of the genera Artemisia, Centaurea, Chrysanthemum, Lychnis, and Senecio, having leaves and stems covered with dustlike down.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.