1. an extinct marine mollusk with a bullet-shaped internal shell, related to modern squid and cuttlefish
Usage: paleontology
2. the fossilized bullet-shaped shell of such a mollusk
Usage: paleontology

Examples

• The museum displayed several belemnite fossils from the Jurassic period.
• Belemnites were abundant in ancient seas millions of years ago.
• The pointed belemnite fossil was perfectly preserved in the limestone.
• Scientists study belemnites to understand prehistoric marine ecosystems.
• Children often find belemnite fossils on beaches in certain regions.
• The belemnite’s internal shell helped it maintain buoyancy while swimming.