ammonite

noun2

1. •
   Any of an extinct group of cephalopods of the subclass Ammonoidea; a fossil shell of such an animal.

   • There's more interest to my mind in a neolithic scraper than in a whole show-case-full of ammonites and belemnites. — 1927
2. •
   An explosive prepared from a mixture of TNT and ammonium nitrate; a form of amatol, popular in Eastern Europe and China.

adjective1

1. •
   Of or pertaining to the Ammonites.

noun1

1. •
   A native or inhabitant of Ammon.