An acorn cup is the rough little cup an oak seed sits in. Collect the acorn cups.
It was once used for tanning leather and for making ink, since it is full of tannin. An acorn cup is the part that stays on the tree when the seed drops.
1nounacorn cupThe rough little cup an oak seed sits in.
“The path was covered in acorn cups and no acorns at all.”
acorn cup is a part.
Acorn plus cup; acorn comes from Old English aecern, the fruit of a wild tree.
From acorn + cup.
Etymology from Wiktionary, CC BY-SA
Practised in Trees & Flowers