Final answer:
Geriatrics is a medical specialty focusing on the study and treatment of diseases associated with aging in the elderly population.
Step-by-step explanation:
The term "geriatrics" refers to a medical specialty that focuses on the elderly. It is concerned with the study and treatment of diseases associated with aging. This field was first defined by Dr. Ignatz Nascher in the early 1900s, and it encompasses the medical treatment of older adults, addressing the unique challenges they face. Geriatrics is distinct from gerontology, which is a broader field examining the biological, social, and psychological aspects of aging.