citron

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A thorny evergreen shrub or small tree (Citrus medica) native to India and widely cultivated for its large lemonlike fruits that have a thick warty rind.
2. n. The fruit of this plant, whose rind is often candied and used in confections and fruitcakes.
3. n. A globose watermelon (Citrullus lanatus var. citroides) having white flesh that is candied or pickled.
4. n. A grayish-green yellow.

Century Dictionary and Cyclopedia

1. n. The fruit of the citron-tree, a variety of Citrus medica, distinguished from the lemon by the absence of an umbo at the summit and by its very thick rind. The rind is candied and used in confections and pastries. The fingered citron is a variety in which the fruit is curiously divided into large fingerlike lobes.
2. n. The citron-tree, Citrus medica.
3. n. A round and nearly solid variety of the watermelon, Citrullus vulgaris, with white and almost flavorless flesh, sometimes used as a preserve.
4. n. Same as citron-water.

Wiktionary

1. n. a greenish yellow colour.
2. n. a small citrus tree, Citrus medica
3. n. the fruit of a citron tree.
4. n. the candied rind of the citron fruit.
5. adj. Of a greenish yellow colour.

GNU Webster's 1913

1. n. (Bot) 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.
2. n. A citron tree, Citrus medica.
3. n. A citron melon.

WordNet 3.0

1. n. thorny evergreen small tree or shrub of India widely cultivated for its large lemonlike fruits that have thick warty rind
2. n. large lemonlike fruit with thick aromatic rind; usually preserved