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[dal-yuh, dahl- or, esp. British, deyl-] /ˈdæl yə, ˈdɑl- or, esp. British, ˈdeɪl-/
any composite plant of the genus Dahlia, native to Mexico and Central America and widely cultivated for its showy, variously colored flower heads.
the flower or tuberous root of a dahlia.
a pale violet or amethyst color.
of the color dahlia.
Origin of dahlia
1791; < New Latin, named after Anders Dahl (died 1789), Swedish botanist; see -ia Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for dahlia
  • No one would ever expect to get a first-rate heartsease or dahlia from the seed of a wild plant.
  • The edible root, which measures one and a half to two inches in length, resembles a dahlia tuber.
  • When your flowers are up and ready to cut, see our dahlia cutting tips.
British Dictionary definitions for dahlia


any herbaceous perennial plant of the Mexican genus Dahlia, having showy flowers and tuberous roots, esp any horticultural variety derived from D. pinnata: family Asteraceae (composites)
the flower or root of any of these plants
Word Origin
C19: named after Anders Dahl, 18th-century Swedish botanist; see -ia
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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Word Origin and History for dahlia

1804, named 1791 by Spanish botanist Antonio José Cavanilles for Anders Dahl (1751-1789), Swedish botanist and pupil of Linnaeus, who discovered it in Mexico in 1788. No blue variety had ever been cultivated, hence blue dahlia, figurative expression for "something impossible or unattainable" (1880).

Online Etymology Dictionary, © 2010 Douglas Harper
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