Definition of "citron" [cit•ron]

• 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. (noun)
• The fruit of this plant, whose rind is often candied and used in confections and fruitcakes. (noun)
• A globose watermelon (Citrullus lanatus var. citroides) having white flesh that is candied or pickled. (noun)
• A grayish-green yellow. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The Buddha's hand citron is budding, but the flowers haven't opened yet."
• "Sukkoth observance involves waving a palm frond and carrying a lemon-like fruit called a citron etrog in Hebrew."
• "There is a subgroup of water-melons, C. lanatus citroides, known as citron or preserving melons, with inedible flesh but abundant rind for these preparations."