ammonite


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

ammonite

(ăm`ənīt), one of a type of extinct marine cephalopodcephalopod
, member of the class Cephalopoda, the most highly organized group of mollusks (phylum Mollusca), and including the squids, octopuses, cuttlefish, and nautiluses. The class as a whole has become adapted for a free-swimming existence.
..... Click the link for more information.
 mollusk, related to the nautilusnautilus
or chambered nautilus,
cephalopod mollusk belonging to the sole surviving genus (Nautilus) of a subclass that flourished 200 million years ago, known as the nautiloids.
..... Click the link for more information.
 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 MolluscaMollusca
, taxonomic name for the one of the largest phyla of invertebrate animals (Arthropoda is the largest) comprising more than 50,000 living mollusk species and about 35,000 fossil species dating back to the Cambrian period.
..... Click the link for more information.
, class Cephalopoda, subclass Ammonoidea.

ammonite

[′a·mə‚nīt]
(materials)
An explosive containing 70-95% ammonium nitrate.
(paleontology)
A fossil shell of the cephalopod order Ammonoidea.

ammonite

1
1. 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. the shell of any of these animals, commonly occurring as a fossil

ammonite

2
1. an explosive consisting mainly of ammonium nitrate with smaller amounts of other substances, such as TNT
2. a nitrogenous fertilizer made from animal wastes
References in periodicals archive ?
They found that the ammonite is a juvenile one, belonging to a
In the 19th Century, enterprising craftsmen would carve snake-like heads on to the ammonites they had picked up and sell them to tourists as souvenirs.
The Mianwali Formation with a rich Ammonite fauna has been dated from middle Griesbachian to late Spathian.
Caption: SERIOUS INTENT Fast yet beautiful, the Southern Wind 82 Ammonite is a first-class luxury craft designed for racing performance.
Rashi (to TB Gittin 38a) cites the abovementioned exchange between Jephthah and the Ammonite king as the Talmud's source for the assumption that Sihon conquered land from Ammon.
In the Hebrew Bible, Deuteronomy 23:3 notes God's command that: "An Ammonite or a Moabite shall not enter into the assembly of the LORD; even to the tenth generation shall none of them enter into the assembly of the LORD for ever."
Such entwinement of natural and cultural forms was furthered in the images and objects shown alongside Nightlife: Ammonite Dub, 2015, composed of a sliced-in-half ammonite fossil and a turntable needle encased within a double mirror that seemingly reached endlessly into the gallery wall; Reid/Coxsone (gold monitors), 2015, which consists of modified copies of the two Ellis records from which Nightlife's dub sample was made; and the Polaroid series "Sober City," 2014-15, in which images of urban spaces and monuments have been double-exposed with that of an amethyst crystal from New York's American Museum of Natural History.
A team of high school students from Domingo Yu Chu National School wanted to tell the story of the ammonite fossils found in Mansalay, Oriental Mindoro.
The new ammonite data have permitted a re-assessment of the ammonite biostratigraphy in the study area.
Reading "and it was about a month" at the beginning of chapter 11 places the account of Nahash the Ammonite's siege of jabesh-gilead firmly in the earliest days of Saul's kingship.