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bitter orange, Seville orange, sour orange, bitter orange tree, bigarade, marmalade orange, Citrus aurantium | any of various common orange trees yielding sour or bitter fruit; any of various common orange trees yielding sour or bitter fruit; used as grafting stock ❲Citrus aurantium❳ | ||
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bitter orange, Seville orange, sour orange | highly acidic orange used especially in marmalade |