1. the dorsal plate of the first segment of the thorax in insects
Usage: entomology

Examples

• The beetle’s pronotum was covered in distinctive markings.
• Entomologists use the shape of the pronotum to identify different species.
• The pronotum protects the insect’s vital organs beneath.
• A magnifying glass revealed tiny hairs on the pronotum.
• The pronotum varies greatly in size among different insect orders.
• Damage to the pronotum can affect the insect’s mobility.