pin·​nule ˈpin-(ˌ)yül How to pronounce pinnule (audio)
: any of the secondary branches of a plumose organ especially of a crinoid
: one of the ultimate divisions of a twice pinnate leaf

Word History


New Latin pinnula, from Latin, diminutive of pinna

First Known Use

1748, in the meaning defined at sense 1

Time Traveler
The first known use of pinnule was in 1748

Dictionary Entries Near pinnule

Cite this Entry

“Pinnule.” Dictionary, Merriam-Webster, Accessed 20 Jun. 2024.

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