Dictionary
ves•i•cant
Pronunciation: (ves'i-kunt), [key]—
adj.
producing a blister or blisters, as a medicinal substance; vesicating.
—
n.
1. a vesicant agent or substance.
2. (in chemical warfare) a chemical agent that causes burns and destruction of tissue both internally and externally.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.