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hyponasty

[ hahy-puh-nas-tee ]
/ ˈhaɪ pəˌnæs ti /
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noun Botany.

increased growth along the lower surface of a plant or plant part, causing it to bend upward.

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Origin of hyponasty

1870–75; hypo- + Greek nast(ós) pressed close, compact + -y3
hy·po·nas·tic, adjectivehy·po·nas·ti·cal·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for hyponasty

hyponasty
/ (ˈhaɪpəˌnæstɪ) /

noun

increased growth of the lower surface of a plant part, resulting in an upward bending of the partCompare epinasty
hyponastic, adjectivehyponastically, adverb
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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