bok choy
Brassica rapa subsp. chinensis
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

A stack of bok choy for sale in a market.
Licensed from iStockPhoto
Learn more about bok choy