1. The science and practice of applying nutrition principles to promote health and manage disease through diet.
Usage: Usually treated as a singular noun; often used in academic and healthcare contexts

Examples

• She studied dietetics in college to become a registered dietitian.
• Dietetics plays an important role in treating diabetes and heart disease.
• The hospital hired a specialist in dietetics to improve patient meal plans.
• Modern dietetics combines chemistry, biology, and food science.
• Dietetics professionals help patients make healthier food choices.