from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A perennial plant (Silene flos-cuculi syn. Lychnis flos-cuculi) in the pink family, native to Europe and also found in eastern North America, having opposite leaves and pink flowers with deeply lobed petals.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun UK A type of wild
campion, Lychnis flos-cuculi, in the family Caryophyllaceae, which grows across Europe and has pink flowers.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun common perennial native to Europe and western Asia having usually pink flowers with ragged petals
from Wiktionary, Creative Commons Attribution/Share-Alike License
From ragged + robin, probably because of the untidy appearance of its petals.
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