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Grapefruit, evergreen tree (Citrus paradisi) of the rue family, and its citrus fruit, which weigh from 1–5 lb (0.45–2.27 kg). First discovered in the West Indies, the grapefruit is believed to be a mutation of the Asian pomelo (C. maxima).

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21st Century Webster's Family Encyclopedia21st Century Webster's Family Encyclopedia - Grand Rapids to Hadron