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Definition of Ammonoid in English :

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Ammonoid meaning in English

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Ammonoid

see synonyms of ammonoid

Noun

1. ammonite, ammonoid

one of the coiled chambered fossil shells of extinct mollusks

WordNet Lexical Database for English. Princeton University. 2010.

Ammonoid

see synonyms of ammonoid
noun
palaeontology
any of the extinct group of sea-dwelling cephalopod molluscs with coiled and chambered shells

Collins English Dictionary. Copyright © HarperCollins Publishers

Ammonoid

see synonyms of ammonoid
n.
An extinct cephalopod mollusk of the subclass Ammonoidea of the Devonian to Cretaceous Periods, having a straight or coiled chambered shell characterized by more or less intricate suture patterns where the septa between individual chambers join the outer shell wall.

The American Heritage ® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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