Meaning of SOUR ORANGE

WordNet Dictionary
	Definition:		[n]  highly acidic orange used especially in marmalade [n]  any of various common orange trees yielding sour or bitter fruit; used as grafting stock
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	Synonyms:		bigarade, bitter orange, bitter orange, bitter orange tree, Citrus aurantium, marmalade orange, Seville orange, Seville orange
	See Also:		bigarade, bitter orange tree, Citrus aurantium, genus Citrus, marmalade orange, orange, orange, orange tree, sour orange, sour orange