ammonite(redirected from Ammonitida)
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1. A member of a Semitic people inhabiting ancient Ammon, mentioned frequently in the Bible.
2. The Semitic language of the Ammonites.
[From Late Latin Ammōnītēs, the Ammonites, from Hebrew 'ammônî, Ammonite, from 'ammôn, Ammon, perhaps of Canaanite origin; see ʕmm in Semitic roots.]
1. An extinct cephalopod mollusk of the order Ammonitida of the Permian to Cretaceous Periods, having a thick, usually coiled shell characterized by intricate suture patterns where the septa between individual chambers join the outer shell wall.
2. An ammonoid.
[New Latin Ammōnītēs, from Latin (cornū) Ammōnis, (horn) of Amun, ammonite, genitive of Ammōn, Amun, from Greek : from Egyptian jmn.]
am′mo·nit′ic (-nĭt′ĭk) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
1. (Palaeontology) any extinct marine cephalopod mollusc of the order Ammonoidea, which were common in Mesozoic times and generally had a coiled partitioned shell. Their closest modern relative is the pearly nautilus
2. (Palaeontology) the shell of any of these animals, commonly occurring as a fossil
[C18: from New Latin Ammōnītēs, from Medieval Latin cornū Ammōnis, literally: horn of Ammon]
1. (Elements & Compounds) an explosive consisting mainly of ammonium nitrate with smaller amounts of other substances, such as TNT
2. (Elements & Compounds) a nitrogenous fertilizer made from animal wastes
[C20: from ammo(nium) + ni(tra)te]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
the coiled, chambered fossil shell of an ammonoid.
[1700–10; < New Latin Ammonites= Medieval Latin (cornū) Ammōn(is) literally, horn of Ammon1 + -ītes -ite1]
am`mo•nit′ic (-ˈnɪt ɪk) adj.
am•mon•i•toid (əˈmɒn ɪˌtɔɪd) adj.
a member of a Semitic people inhabiting ancient Ammon.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
Any of the coiled fossil shells of a group of extinct mollusks related to the nautilus. Ammonites were especially abundant during the Mesozoic Era.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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|Noun||1.||ammonite - one of the coiled chambered fossil shells of extinct mollusks|
fossil - the remains (or an impression) of a plant or animal that existed in a past geological age and that has been excavated from the soil
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