pulvinus

noun

pul·​vi·​nus ˌpəl-ˈvī-nəs How to pronounce pulvinus (audio) -ˈvē- How to pronounce pulvinus (audio)
plural pulvini ˌpəl-ˈvī-ˌnī How to pronounce pulvinus (audio)
-ˈvē-(ˌ)nē
: a swelling at the base of a petiole or petiolule

Examples of pulvinus in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
While the pulvinus doesn’t exist in all plants, it’s typically found at the base of a leaf and works as a motor organ. Lydia Rivers, Discover Magazine, 20 July 2021 The pulvinus cells create noticeable movement in plant leaves by enlarging and shrinking. Lydia Rivers, Discover Magazine, 20 July 2021

Word History

Etymology

New Latin, from Latin, cushion

First Known Use

circa 1857, in the meaning defined above

Time Traveler
The first known use of pulvinus was circa 1857

Dictionary Entries Near pulvinus

Cite this Entry

“Pulvinus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pulvinus. Accessed 23 Dec. 2024.

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