• Ammonites
  • WordNet 3.6
    • n ammonite one of the coiled chambered fossil shells of extinct mollusks
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Webster's Revised Unabridged Dictionary
    • n Ammonite (Paleon) A fossil cephalopod shell related to the nautilus. There are many genera and species, and all are extinct, the typical forms having existed only in the Mesozoic age, when they were exceedingly numerous. They differ from the nautili in having the margins of the septa very much lobed or plaited, and the siphuncle dorsal. Also called serpent stone snake stone, and cornu Ammonis.
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Century Dictionary and Cyclopedia
    • n ammonite One of the fossil shells of an extensive genus (Ammonites) of extinct cephalopodous mollusks (cuttle-fishes), of the family Ammonitidæ, coiled in a plane spiral, and chambered within like the shell of the existing nautilus, to which the ammonites were allied. These shells have a nacreous lining and a porcelanous layer externally, and are smooth or rugose, the ridges straight, crooked, or undulated, and in some cases armed with projecting spines or tubercles. The species already described number about 500, and range from the Lias to the Chalk formations, inclusive. They vary in size from mere specks to 3 or 4 feet in diameter. Also written hammonite. Sometimes called snakestone, ammon-stone, and formerly cornu Ammonia (Ammon's horn).
    • n ammonite A name applied to certain explosive materials, patented by Favier, containing ammonium nitrate with other substances, chiefly nitro- or dinitro-naphthalene.
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Chambers's Twentieth Century Dictionary
    • n Ammonite am′mon-īt the fossil shell of an extinct genus of molluscs, so called because they resemble the horns on the statue of Jupiter Ammon, worshipped as a ram.
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Webster's Revised Unabridged Dictionary
L. cornu Ammonis, born of Ammon; L. Ammon, Gr. an appellation of Jupiter, as represented with the horns of a ram. It was originally the name of an. Egyptian god, Amun,


In literature:

Ammonites, giant sea snails, with chambered shells that reached a yard and more in diameter, and gigantic squids, swam the seas.
"Earth and Sky Every Child Should Know" by Julia Ellen Rogers
An extinct genus of chambered shells, allied to the Ammonites, having the siphuncle near the dorsal margin.
"Principles of Geology" by Charles Lyell
The most remarkable fossils in the Lower Greensand are the various genera and species of the ammonites and their kindred.
"The Geological Story of the Isle of Wight" by J. Cecil Hughes
BACULI'TES, a fossil genus allied to the ammonites, characteristic of cretaceous strata, having a straight tapering shell.
"The New Gresham Encyclopedia. Vol. 1 Part 3" by Various
Judas subdues also the Idumeans of the southward, and the Ammonites.
"Stories of the Olden Time" by Various
In this there are no corals, but great abundance of cephalopoda of the genera Ammonite and Belemnite.
"A Manual of Elementary Geology" by Charles Lyell
The Ammonites for example in these last pages of the Mesozoic chapter exhibit a multitude of fantastic forms.
"A Short History of the World" by H. G. Wells
This city of Rabath was the capital of the Ammonites, into whose country the Hebrews had not yet penetrated.
"A Philosophical Dictionary, Volume 8 (of 10)" by François-Marie Arouet (AKA Voltaire)
The number of ammonites of all sizes is surprising.
"A Month in Yorkshire" by Walter White
For some other may seek the ideas for the terms, and find them, as animals were found for the Ammonites.
"The Campaner Thal and Other Writings" by Jean Paul Friedrich Richter

In news:

He is currently examining the nature of the Cretaceous-Tertiary extinction event with studies in France and Spain involving detailed field work that concentrates on ammonites and bivalves.