Alopecia/ˌæləˈpiːʃə/ Definition 1 of 1Pro Tip 1/3Medical Condition Alopecia is a health issue, not a style choice. He didn't shave his head; he developed alopecia. Pro Tip 2/3Sensitive Topic Discuss alopecia respectfully as it can affect people's self-esteem. She prefers to wear a hat since her alopecia became noticeable. Pro Tip 3/3Not Just Baldness Alopecia can involve partial hair loss, not just complete baldness. Alopecia has caused patches of hair loss, not full baldness.