Ammonitoidea Am*mon`i*toid"e*a, n. pl. [NL., fr. Ammonite + -oid.] (Zo["o]l.) An extensive group of fossil cephalopods often very abundant in Mesozoic rocks. See {Ammonite}. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

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  • ammonitoidea — am·mo·ni·toi·dea …   English syllables

  • ammonitoidea — ˌaməˌnīd.ˈȯidēə Etymology: New Latin, from Ammonites + oidea synonym of ammonoidea …   Useful english dictionary

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