A cuplike structure, as the part of an acorn that holds the nut.
Webster's New World
A small cup-shaped structure or organ, such as the cup at the base of an acorn or one of the suckers on the feet of certain flies.
Other Word Forms of Cupule
Origin of Cupule
Late Latin cūpula little cask diminutive of Latin cūpa tub
From American Heritage Dictionary of the English Language, 5th Edition
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