perianth

[per-ee-anth]
noun Botany.
the envelope of a flower, whether calyx or corolla or both.

Origin:
1700–10; earlier perianthium < Neo-Latin. See peri-, anth-, -ium

perianthial, adjective
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
perianth (ˈpɛrɪˌænθ)
 
n
the outer part of a flower, consisting of the calyx and corolla
 
[C18: from French périanthe, from New Latin, from peri- + Greek anthos flower]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

perianth
"envelope of a flower," 1706, from Fr. périanthe, from Mod.L. perianthium (17c.), lit. "that which is round the flower," from peri- + Gk. anthos "flower" (see anther).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
perianth   (pěr'ē-ānth')  Pronunciation Key 
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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Example sentences
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.
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