lady's-slipper

or la·dy-slip·per

[ ley-deez-slip-er ]
/ ˈleɪ dizˌslɪp ər /

noun

any orchid of the genus Cypripedium, the flowers of which have a protruding petal somewhat resembling a slipper: all species are reduced in numbers, some greatly.
any of several other related plants having similar flowers, as of the genera Paphiopedilum and Phragmipedium.

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Origin of lady's-slipper

An Americanism dating back to 1830–40
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for lady's-slipper

lady's-slipper

noun

any of various orchids of the Eurasian genus Cypripedium, esp C. calceolus, having reddish or purple flowersSee also moccasin flower, cypripedium
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