A fruit resembling a lemon, but larger, and pleasantly aromatic; it is produced by the citron tree (Citrus medica). The thick rind, when candied, is the citron of commerce. The fruit was once called the lime. [1913 Webster]
A citron tree, Citrus medica. [1913 Webster]
A citron melon. [1913 Webster]
Citron melon. (a)A small variety of muskmelon with sugary greenish flesh.(b)A small variety of watermelon, whose solid white flesh is used in making sweetmeats and preserves. --
Citron tree(Bot.), the tree which bears citrons. It was probably a native of northern India, and is now understood to be the typical form of Citrus Medica.