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One of the coiled chambered fossil shells of extinct mollusks
Answer for the clue "One of the coiled chambered fossil shells of extinct mollusks ", 8 letters:
ammonoid
Word definitions for ammonoid in dictionaries
Wiktionary
Word definitions in Wiktionary
a. Characteristic of an ammonite n. ammonite
WordNet
Word definitions in WordNet
n. one of the coiled chambered fossil shells of extinct mollusks [syn: ammonite ]
The Collaborative International Dictionary
Word definitions in The Collaborative International Dictionary
ammonoid \ammonoid\ n. 1. one of the coiled chambered fossil shells of extinct mollusks; same as ammonite . Syn: ammonite
Usage examples of ammonoid.
Jurassic marine strata are often correlated worldwide with great precision and confidence by recognition of a regular succession of ammonoid fauna that occurs in the same sequence wherever marine sediments of suitable age are preserved.
Because they evolved rapidly, had worldwide distribution by virtue of their open-water habitats, and species are readily distinguished, ammonoids are index fossils for the Jurassic.