ALL meanings of ammonoid
am·mo·noid
A a - noun ammonoid any of the extinct group of sea-dwelling cephalopod molluscs with coiled and chambered shells 3
- noun ammonoid An extinct cephalopod mollusk with a flat -coiled spiral shell, found commonly as a fossil in marine deposits from the Devonian to the Cretaceous periods. 1
- noun ammonoid any cephalopod mollusk of the extinct order Ammonoidea, from the Devonian to the Cretaceous periods, having a coiled, chambered shell. 1
- noun ammonoid ammonite. 0
- adjective ammonoid Characteristic of an ammonite. 0