any of several dark-brown prairie soils
Webster’s New World College Dictionary, 4th Edition. Copyright © 2010 by
Houghton Mifflin Harcourt. All rights reserved.
Word origin of 'brunizem'
coined (1938) by F. F. Riecken and G. Smith, U.S. agronomists < bruni-,
brown (suggested by Fr brun
: see brunet
) + Russ (cherno)zem,
(black) earth (see chernozem
) < IE base *ĝhthem-,
earth > L humus