1. of, relating to, or containing ammonites (extinct marine mollusks with coiled shells)
Usage: paleontology; geology

Examples

• The ammonitic fossils in the museum collection date back to the Mesozoic Era.
• Geologists studied the ammonitic deposits to understand the ancient ocean environment.
• The cliff face revealed several ammonitic shells embedded in the limestone.
• Ammonitic remains are commonly found in Jurassic rock formations.