orange, bitter

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orange, bitter The fruit of the subtropical tree Citrus aurantium; known as Seville orange in Spain, bigaradier in France, melangol in Italy, and khush‐khash in Israel.

It is used mainly as root stock, because of its resistance to the gummosis disease of citrus. The fruit is too acid to be edible, but is used in the manufacture of marmalade; the peel oil is used in the liqueur curaçao; the peel and flower oils (neroli oil) and the oils from the green twigs (petit‐grain oils) are used in perfumery.