Wiktionary
hexanitrodiphenylamine
n. (context organic compound English) A substance that was mixed with TNT in World War II to make it more explosive.
Wikipedia
Hexanitrodiphenylamine
Hexanitrodiphenylamine (abbreviated HND), is an explosive chemical compound with the formula CHNO. HND was used extensively by the Japanese during World War II but was discontinued due to its toxicity.