ammonoid

/ˈæməˌnɔɪd/
IPA guide

Definitions of ammonoid
  1. noun
    an extinct marine mollusk with a coiled, chambered shell or the shell itself
    synonyms: ammonite
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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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