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pulvinus

[puhl-vahy-nuh s] /pʌlˈvaɪ nəs/
noun, plural pulvini
[puhl-vahy-nahy] /pʌlˈvaɪ naɪ/ (Show IPA)
1.
Botany. a cushionlike swelling at the base of a leaf or leaflet, at the point of junction with the axis.
2.
Architecture, pulvinar (def 2).
Origin
1855-1860
1855-60; < Latin pulvīnus cushion
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Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for pulvini

pulvinus

/pʌlˈvaɪnəs/
noun (pl) -ni (-naɪ)
1.
a swelling at the base of a leafstalk: changes in its turgor pressure cause changes in the position of the leaf
Word Origin
C19: from Latin: cushion
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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