What does ammonoid mean?
A type of extinct marine cephalopod with a spiral shell, typically found in the Jurassic and Cretaceous periods. Ammonoids were characterized by their coiled shells and often complex suture patterns.
Example
"The fossil record shows that ammonoids were a diverse group of marine animals that played a key role in the Earth's ecosystems during the Mesozoic era."
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.