ammonoid

English Thesaurus

1. one of the coiled chambered fossil shells of extinct mollusks (noun.object)

hypernym	:	fossil,
definition	:	the remains (or an impression) of a plant or animal that existed in a past geological age and that has been excavated from the soil (noun.object)

derivation	:	ammonitic,
definition	:	of or related to an order of fossil cephalopods (adj.pert)

derivation	:	ammonitic,
definition	:	of or related to an order of fossil cephalopods (adj.pert)