a. 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.
b. The fruit of this plant, whose rind is often candied and used in confections and fruitcakes.
2. A globose watermelon (Citrullus lanatus var. citroides) having white flesh that is candied or pickled.
3. A grayish-green yellow.
[Middle English, from Old French, alteration (influenced by limon, lemon) of Latin (mālum) citreum, citron (fruit), from citrus, citron tree.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
The American Heritage Dictionary Blog
Check out our blog, updated regularly, for new words and revised definitions, interesting images from the 5th edition, discussions of usage, and more.