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ammonoid

noun
am·​mo·​noid | \ ˈa-mə-ˌnȯid How to pronounce ammonoid (audio) \

Definition of ammonoid

: ammonite Mesozoic ammonoids

First Known Use of ammonoid

1866, in the meaning defined above

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The first known use of ammonoid was in 1866

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More from Merriam-Webster on ammonoid

Britannica.com: Encyclopedia article about ammonoid

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