a bushy Old World plant, Glycine max, of the legume family, grown in the U.S., chiefly for forage and soil improvement.
the seed of this plant, used for food, as a livestock feed, and for a variety of other commercial uses.

Origin of soybean

First recorded in 1795–1805; soy + bean Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for soybean

Contemporary Examples of soybean

Historical Examples of soybean

Word Origin and History for soybean

1795, from soy + bean (n.).

Online Etymology Dictionary, © 2010 Douglas Harper