pinnule

noun
pin·​nule | \ ˈpin-(ˌ)yül How to pronounce pinnule (audio) \

Definition of pinnule

1 : any of the secondary branches of a plumose organ especially of a crinoid
2 : one of the ultimate divisions of a twice pinnate leaf

First Known Use of pinnule

1748, in the meaning defined at sense 1

History and Etymology for pinnule

New Latin pinnula, from Latin, diminutive of pinna

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The first known use of pinnule was in 1748

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Cite this Entry

“Pinnule.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pinnule. Accessed 27 Oct. 2021.

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More from Merriam-Webster on pinnule

Britannica.com: Encyclopedia article about pinnule

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