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1. A tree (Citrus junos) native to China and widely cultivated in Japan for its round, golden-yellow fruit.
2. The fruit of this tree, having sour juice used in sauces and dressings and an aromatic rind used as flavoring.

[Japanese, possibly from Mandarin yòuzi, pomelo fruit (from Mandarin yòu, pomelo from Middle Chinese jiw` + Mandarin zi, n. suff.; see gyoza) or possibly from earlier Japanese yusu, yu no su (Japanese yu, yuzu from Mandarin yòu, pomelo + Japanese no, possessive particle + Japanese su, vinegar).]


(Botany) a citrus fruit about the size of a golf ball, a hybrid of a primitive citrus called Ichang papeda and a mandarin, which grows on tall trees in Japan and has a strong sour flavour. Its rind and juice are a popular ingredient in Japanese cookery
[C21: Japanese]