Definition of "charlock" []

• An annual weed (Sinapis arvensis) in the mustard family, native to Eurasia and naturalized in North America, having racemes of yellow flowers and hairy stems and foliage. (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.

• "Such dry waste places send up plants to flower, such as charlock and poppy, quicker than happens in better soil, but they do not reach nearly the height or size."
• "UC Riverside scientists studying the genetic makeup of wild radishes in California have determined that the California wild radish is descended from hybrids between two species: cultivated radish and the weed, jointed charlock."
• "He decided to pick it as a centerpiece for his bouquet of marguerites, charlock and cornflowers."