Found 2 items, similar to ammonoid.
English → English (WordNet) Definition: ammonoid ammonoid n : one of the coiled chambered fossil shells of extinct mollusks [syn: ammonite]
English → English (gcide) Definition: ammonoid ammonoid \ammonoid\ n. 1. one of the coiled chambered fossil shells of extinct mollusks; same as ammonite. Syn: ammonite [WordNet 1.5]