cupule

[kyoo-pyool]
noun
1.
Botany.
a.
a cup-shaped whorl of hardened, cohering bracts, as in the acorn. See illus. under acorn.
b.
a cup-shaped outgrowth of the thallus of certain liverworts.
c.
the apothecium of a cup fungus.
2.
Zoology. a small cup-shaped sucker or similar organ or part.

Origin:
1820–30; < Neo-Latin cūpula, Late Latin: small tub; see cupola

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
cupule (ˈkjuːpjuːl)
 
n
biology a cup-shaped part or structure, such as the cup around the base of an acorn
 
[C19: from Late Latin cūpula; see cupola]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
Many of the cupule features are located under the thick growth of western chokecherry that covers the site.
Interspersed between them are other smaller middens and a large cupule boulder.
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