iodamide

from The Century Dictionary.

• noun A violently explosive black powder produced by the interaction of iodine and aqueous ammonia. The substance so produced, however, varies in composition and is probably in the first instance nitrogen tri-iodide(NI₃, or rather N₂I₆), readily changing to compounds containing hydrogen, of which the only one for which the name iodamide should be used is NH₂I or N₂H₄I₂.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun chemistry A particular molecule used as a contrast medium.