Meaning of ACORN CUP

Pronunciation:			'eykorn kup
WordNet Dictionary
	Definition:		[n]  cup-shaped structure of hardened bracts at the base of an acorn
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	Synonyms:		cupule
	See Also:		acorn, cup
Webster's 1913 Dictionary
	Definition:		\A"corn cup\ The involucre or cup in which the acorn is fixed.