Seville orange
US /ˌsev.ɪl ˈɔːr.ɪndʒ/
UK /ˌsev.ɪl ˈɔːr.ɪndʒ/
1.
a bitter orange, Citrus aurantium, native to southeastern Asia, cultivated in warm regions, and used for marmalade and as a rootstock.
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She made a delicious marmalade using Seville oranges.
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The unique bitterness of Seville oranges makes them ideal for marmalade.