1. the active growth phase of the hair cycle, during which hair follicles produce new hair
Usage: technical; biology/dermatology

Examples

• Hair remains in the anagen phase for several years before transitioning to the next stage.
• During anagen, the hair follicle is actively dividing and producing new hair cells.
• The length of the anagen phase determines how long your hair can grow.
• Dermatologists study anagen to understand hair loss conditions.
• Most scalp hairs are in the anagen phase at any given time.