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ammonite

/ˌæməˈnaɪt/

Other forms: ammonites

Definitions of ammonite
  1. noun
    one of the coiled chambered fossil shells of extinct mollusks
    synonyms: ammonoid
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    type of:
    fossil
    the remains (or an impression) of a plant or animal that existed in a past geological age and that has been excavated from the soil
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