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pulvinus

[puhl-vahy-nuhs]

pul·vi·nus

[puhl-vahy-nuhs]
noun, plural pul·vi·ni [-nahy] .
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:
1855–60; < Latin pulvīnus cushion
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Pulvinus is always a great word to know.
So is sporophyte. Does it mean:
organisms having pairs of homologous chromosomes
form of a diploid plant in the alternation of generations that produces asexual spores
Collins
World English Dictionary
pulvinus (pʌlˈvaɪnəs)
 
n , pl -ni
a swelling at the base of a leafstalk: changes in its turgor pressure cause changes in the position of the leaf
 
[C19: from Latin: cushion]

Collins English Dictionary - Complete & Unabridged 10th Edition
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