Chiropractor: A chiropractic practitioner. Becoming a doctor of chiropractic (DC) requires a minimum of 2 years of college and 4 years in a school of chiropractic medicine. Some chiropractors also earn a traditional medical degree (MD) or other additional qualifications. Not all chiropractors are alike in their practice. The International Chiropractors Association believes that patients should be treated by spinal manipulation alone, whereas the American Chiropractic Association advocates a multidisciplinary approach that combines spinal adjustment with other modalities, such as physical therapy, psychological counseling, and dietary measures.