Definition of "snow-in-summer" []

• A woolly, white, mat-forming perennial herb (Cerastium tomentosum) native to Italy and widely cultivated in rock gardens for its showy white flowers with notched petals. (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.