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[per-ee-anth] /ˈpɛr iˌænθ/
noun, Botany
the envelope of a flower, whether calyx or corolla or both.
Origin of perianth
1700-10; earlier perianthium < New Latin. See peri-, anth-, -ium
Related forms
perianthial, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for perianth
  • Many have white perianth segments and yellow cup, but there are other color combinations.
  • The segments of the perianth also closed on the pistil, but more slowly than the stamens.
  • The perianth is pale blue with a yellow spot in the center.
  • The perianth is strongly reflexed in bright sunlight to only sightly spreading in low light conditions.
British Dictionary definitions for perianth


the outer part of a flower, consisting of the calyx and corolla
Word Origin
C18: from French périanthe, from New Latin, from peri- + Greek anthos flower
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 perianth

"envelope of a flower," 1706, from French périanthe, from Modern Latin perianthium (17c.), literally "that which is round the flower," from peri- (see peri-) + Greek anthos "flower" (see anther).

Online Etymology Dictionary, © 2010 Douglas Harper
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perianth in Science
The sepals and petals of a flower considered together.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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