ETYM French citron, Late Lat. citro, from Latin citrus citron tree (cf. citreum, sc. malum, a citron), from Greek kitron citron.
1. Large lemonlike fruit with thick aromatic rind; usually preserved.
2. Thorny evergreen small tree or shrub of India widely cultivated for its large lemonlike fruits that have thick warty rind; SYN. citron tree, Citrus medica.