What is the meaning of Acorn cup?

The involucre or cup in which the acorn is fixed.
Webster's Revised Unabridged Dictionary
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APAWebster's. (2011). acorn cup. Retrieved September 27, 2026, from http://smartdefine.org/acorn_cup/definitions/1970524
ChicagoWebster's. 2011. "acorn cup" http://smartdefine.org/acorn_cup/definitions/1970524 (accessed September 27, 2026).
HarvardWebster's 2011, acorn cup, Smart Define, viewed 27 September, 2026, <http://smartdefine.org/acorn_cup/definitions/1970524>.
MLAWebster's. "acorn cup" 27 May 2011. Web. 27 September 2026. <http://smartdefine.org/acorn_cup/definitions/1970524>
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