cu·​pule ˈkyü-(ˌ)pyül How to pronounce cupule (audio)
: a cup-shaped anatomical structure: such as
: an involucre characteristic of the oak in which the bracts are indurated and coherent
: an outer integument partially enclosing the seed of some seed ferns

Example Sentences

Recent Examples on the Web Until now, researchers had focused on a fossil cupule plant called Caytonia, discovered in Yorkshire, U.K., as the closest relative to angiosperms. Elizabeth Pennisi, Science | AAAS, 26 May 2021 The team found that, as with the outer seed coat in modern angiosperm seeds, the cupule tissue curved around the developing seeds. Elizabeth Pennisi, Science | AAAS, 26 May 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'cupule.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History


New Latin cupula, from Late Latin, diminutive of Latin cupa tub — more at hive

First Known Use

1826, in the meaning defined above

Time Traveler
The first known use of cupule was in 1826

Dictionary Entries Near cupule

Cite this Entry

“Cupule.” Dictionary, Merriam-Webster, Accessed 29 Jan. 2023.

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