Definition of "mountain avens" []

• A creeping evergreen plant (Dryas octopetala) in the rose family, widely distributed in northern portions of Eurasia and North America and having flowers with white petals and feathery styles. (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.