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Pronunciation varies by accent · noun
An extinct cephalopod of the subclass †Ammonoidea (including ammonites)..
Although the extinct externally shelled cephalopods ammonoids have an extensive fossil record, their soft tissues are very poorly known and, like extinct and living nautiloids, they are largely presumed to not have possessed an ink sac.
Literally tens of pence with an ammonoid fossil to highlight how bling bling the world of palaeontology has become
Use ammonoid when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Ammonoid means An extinct cephalopod of the subclass †Ammonoidea (including ammonites)..
Common synonyms include ammonite.
The opposite depends on the specific sense.
Although the extinct externally shelled cephalopods ammonoids have an extensive fossil record, their soft tissues are very poorly known and, like extinct and living nautiloids, they are largely presumed to not have possessed an ink sac.
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