ammonite
am·mo·nite
noun \ˈa-mə-ˌnīt\Definition of AMMONITE
: any of a subclass (Ammonoidea) of extinct cephalopods especially abundant in the Mesozoic age that had flat spiral shells with the interior divided by septa into chambers
— am·mo·nit·ic \ˌa-mə-ˈni-tik\ adjective
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Origin of AMMONITE
New Latin ammonites, from Latin cornu Ammonis, literally, horn of Ammon
First Known Use: 1758
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