anthesis

[an-thee-sis]
noun, plural antheses [an-thee-seez] . Botany.
the period or act of expansion in flowers, especially the maturing of the stamens.

Origin:
1825–35; < Neo-Latin < Greek ánthēsis bloom, equivalent to anthē- (verbid stem of antheîn to bloom) + -sis -sis

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World English Dictionary
anthesis (ænˈθiːsɪs)
 
n
the time when a flower becomes sexually functional
 
[C19: via New Latin from Greek: full bloom, from anthein to bloom, from anthos flower]

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

anthesis
1835, from Gk. anthesis, noun of action from antheein "to blossom" (see anther).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
anthesis   (ān-thē'sĭs)  Pronunciation Key 
The period during which a flower is fully open and functional. Also called efflorescence.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Plant height, plant diameter, and date of anthesis will be recorded.
Bagging of the inoculated panicles at the beginning of anthesis generally increased ergot severity on both lines.
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