Dictionary.com
Thesaurus.com

cuckooflower

American  
[koo-koo-flou-er, kook-oo-] / ˈku kuˌflaʊ ər, ˈkʊk u- /

noun

  1. any of various plants, as the lady's-smock or the ragged robin.


cuckooflower British  
/ ˈkʊkuːˌflaʊə /

noun

  1. another name for lady's-smock ragged robin

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of cuckooflower

1570–80; cuckoo + flower, so called because it is found in bloom when the cuckoo is heard