cupule

From cup + -ule.

cupule (plural cupules)

1. Any small structure shaped like a cup, such as at the base of an acorn, or the sucker on the feet of some flies.
   • 2018, Richard Powers, The Overstory, Vintage (2019), page 146:

     Then they extract a three-angled beechnut from its cupule, weigh it, and push it into the loam.

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cupule f (plural cupules)

1. cupule

• “cupule”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012