AMMONITE Meaning of AMMONITE in English am ‧ mo ‧ nite /ˈæmənaɪt/ BrE AmE noun [countable] technical an ↑ extinct sea creature with a ↑ spiral shell that can be found as a ↑ fossil Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012