vomit-the stem of vomit v. used in a few combinations, as † vomit-grass, a grass causing vomiting in dogs; vomit-nut= vomic nut (Simmonds Dict. Trade, 1858); vomit-wortU.S., Indian tobacco (Lobelia inflata).1808Jefferson Writ. (1830) IV. 119 Your presence will be to them what the vomit-grass is to a sick dog.