What is the name of the hook part of a carabiner?

The hook part of a carabiner is referred to as the nose. It is the part of the carabiner where the gate opens and closes, providing a connection point for climbing gear, ropes, or anchor points. The design of the nose is crucial for functionality, as it allows for quick and easy clipping and unclipping while also ensuring a secure fitting when closed. Carabiners are designed to bear loads, and the nose is integral to the overall strength and safety of the equipment, acting as a secure interface for connecting various components in climbing and rescue scenarios.