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)
: a swelling at the base of a petiole or petiolule

Examples of pulvinus in a Sentence

Recent Examples on the Web 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

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'pulvinus.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


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 29 May. 2024.

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