Tear gas, also known as a lachrymatory agent or lachrymator (from Latin lacrima ' tear '), sometimes colloquially known as " mace " after the early commercial self-defense spray, is a chemical weapon that stimulates the nerves of the lacrimal gland in the eye to produce tears. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.