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blue flag

any North American plant of the genus Iris, especially I. versicolor : the state flower of Tennessee.
Origin of blue flag
1775-85, Americanism Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for blue-flag
Historical Examples
  • Here are calamus patches, and alder thickets, and sedges without number; and the prickly carex and blue-flag abound on every side.

    Pastoral Days William Hamilton Gibson
British Dictionary definitions for blue-flag

Blue Flag

an award given to a seaside resort that meets EU standards of cleanliness of beaches and purity of water in bathing areas
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
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