Having or characterized by three grooves.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Examples from the Web for trisulcate
Historical Examples of trisulcate
Buck-wheat with trisulcate seeds, and Cannabis sativa are found here; barley is cultivated.