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daylily

or day lil·y

[dey-lil-ee]
noun
  1. any lily of the genus Hemerocallis, having yellow, orange, or red flowers that commonly last only for a day.
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Origin of daylily

First recorded in 1590–1600
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for day lily

day lily

noun
  1. any widely cultivated Eurasian liliaceous plant of the genus Hemerocallis, having large yellow, orange, or red lily-like flowers, which typically last for only one day and are immediately succeeded by others
  2. the flower of any of these plants
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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