Any of several plants of the genus Panax, especially P. pseudoginseng of eastern Asia or P. quinquefolius of North America, having small greenish flowers grouped in umbels, palmately compound leaves, and forked roots believed to have medicinal properties.
The roots of these plants.
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.