Definitions for: Ammonite


[n] one of the coiled chambered fossil shells of extinct mollusks



Webster (1913) Definition: Am"mon*ite, n. [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.] (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.

Synonyms: ammonoid

See Also: fossil

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