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ammonite
ammonite , one of a type of extinct marine cephalopod mollusk, related to the nautilus and resembling it in having an elaborately coiled and chambered shell. Unlike the interiors of nautilus shells, the chambers of ammonite shells display intricately shaped septa and sutures. The type included numerous species, which were widely distributed during the Mesozoic era, about 200 million years ago. Ammonites are classified in the phylum Mollusca , class Cephalopoda, subclass Ammonoidea. |
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"ammonite." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. 28 May. 2012 <http://www.encyclopedia.com>. "ammonite." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. (May 28, 2012). http://www.encyclopedia.com/doc/1E1-ammonite.html "ammonite." The Columbia Encyclopedia, 6th ed.. 2011. Retrieved May 28, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1E1-ammonite.html |
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ammonite
ammonite An extinct aquatic mollusc of the class Cephalopoda. Ammonites were abundant in the Mesozoic era (225–65 million years ago) and are commonly found as fossils in rock strata of that time, being used as index fossils for the Jurassic period. They were characterized by a coiled shell divided into many chambers, which acted as a buoyancy aid. The external suture lines on these shells increased in complexity with the advance of the group.
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"ammonite." A Dictionary of Biology. 2004. Encyclopedia.com. 28 May. 2012 <http://www.encyclopedia.com>. "ammonite." A Dictionary of Biology. 2004. Encyclopedia.com. (May 28, 2012). http://www.encyclopedia.com/doc/1O6-ammonite.html "ammonite." A Dictionary of Biology. 2004. Retrieved May 28, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O6-ammonite.html |
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ammonite
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"ammonite." World Encyclopedia. 2005. Encyclopedia.com. 28 May. 2012 <http://www.encyclopedia.com>. "ammonite." World Encyclopedia. 2005. Encyclopedia.com. (May 28, 2012). http://www.encyclopedia.com/doc/1O142-ammonite.html "ammonite." World Encyclopedia. 2005. Retrieved May 28, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O142-ammonite.html |
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ammonite
ammonite XVIII. — modL. ammōnītēs, f. L. name cornu Ammōnis ‘horn of Ammon’ given to these fossils from their resemblance to the involuted horn of Jupiter Ammon; see prec. and -ITE.
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T. F. HOAD. "ammonite." The Concise Oxford Dictionary of English Etymology. 1996. Encyclopedia.com. 28 May. 2012 <http://www.encyclopedia.com>. T. F. HOAD. "ammonite." The Concise Oxford Dictionary of English Etymology. 1996. Encyclopedia.com. (May 28, 2012). http://www.encyclopedia.com/doc/1O27-ammonite.html T. F. HOAD. "ammonite." The Concise Oxford Dictionary of English Etymology. 1996. Retrieved May 28, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O27-ammonite.html |
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ammonite
am·mo·nite / ˈaməˌnīt/ • n. an ammonoid that belongs to the order Ammonitida, typically having elaborately frilled suture lines. |
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"ammonite." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. 28 May. 2012 <http://www.encyclopedia.com>. "ammonite." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. (May 28, 2012). http://www.encyclopedia.com/doc/1O999-ammonite.html "ammonite." The Oxford Pocket Dictionary of Current English. 2009. Retrieved May 28, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O999-ammonite.html |
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ammonite
ammonite
•Hamite, samite
•marmite • Semite • Vegemite
•eremite • Hashemite • Fatimite
•chromite • Edomite • sodomite
•stalagmite • Elamite • dolomite
•Adullamite • dynamite • catamite
•Benthamite
•termite, thermite
•Samnite • sennight • midnight
•lignite • selenite • gelignite
•kaolinite • Leninite
•finite, transfinite
•watchnight • fortnight • Sunnite
•exurbanite, suburbanite, urbanite
•manganite • ammonite • Mennonite
•Canaanite • Maronite • bentonite
•Irvingite • respite • alexandrite
•Arkwright • cartwright • nephrite
•playwright • wainwright
•wheelwright • millwright
•shipwright • copyright • Nazirite
•pyrite • eyebright • nitrite • contrite
•chlorite • forthright • downright
•Fulbright • upright • meteorite
•diorite • fluorite
•Labourite (US Laborite) • sybarite
•Thatcherite • phosphorite • azurite
•anchorite • Hitlerite • dolerite
•Amorite • Minorite • laterite
•Hutterite • birthright
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"ammonite." Oxford Dictionary of Rhymes. 2007. Encyclopedia.com. 28 May. 2012 <http://www.encyclopedia.com>. "ammonite." Oxford Dictionary of Rhymes. 2007. Encyclopedia.com. (May 28, 2012). http://www.encyclopedia.com/doc/1O233-ammonite.html "ammonite." Oxford Dictionary of Rhymes. 2007. Retrieved May 28, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O233-ammonite.html |
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