Bible Dictionaries
Ammonitoidea
Webster's Dictionary
(n. pl.) An extensive group of fossil cephalopods often very abundant in Mesozoic rocks. See Ammonite.
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Bibliography Information
Webster, Noah. Entry for 'Ammonitoidea'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​a/ammonitoidea.html. 1828.