Gluconeogenesis is a metabolic pathway that occurs in the liver and, to a lesser extent, in the kidneys. It is the process by which the body synthesizes new glucose (a sugar) from non-carbohydrate precursors, such as amino acids (from proteins) and glycerol (from fats). Gluconeogenesis is essential for maintaining blood glucose levels within a narrow and healthy range, especially when dietary sources of glucose are limited, such as during fasting or periods of intense physical activity.

Unit 3,

Reference: Oxford Concise Medical Dictionary (9th ed) Oxford University Press 2015 ISBN-13: 9780199687817, p1552