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- Dictionaryam·mo·nite/ˈaməˌnīt/
noun
- 1. an ammonoid that belongs to the order Ammonitida, typically having elaborately frilled suture lines.
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noun
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Ammonites were predatory, squidlike creatures that lived inside coil-shaped shells. Like other cephalopods, ammonites had sharp, beaklike jaws inside a ring of tentacles that extended from their shells to snare prey such as small fish and crustaceans. Some ammonites grew more than three feet (one meter) across—possible snack food for the giant mosasaur Tylosaurus. nationalgeographic.com