a substance, usually a chemical, added to a product, esp. an explosive, so that the product is traceable back to its origin or is easily detectable by specially trained security dogs, electronic detectors, etc.
Origin of taggantfrom tag (v.) + -ant
Any of various substances, such as microscopic pieces of multilayered colored plastic, added to a product to indicate its source of manufacture: added taggants to explosives to deter terrorism.
Origin of taggantShort for Microtaggant trademark for tags identifying explosives