Answer:
called combining forms or combining words. They are word parts that are used to create compound words, often in the field of medicine and biology. These word parts are typically derived from Greek or Latin roots and are used to describe various body parts, diseases, conditions, and procedures.
The word "gastro-" is a combining form that refers to the stomach. For example, "gastrointestinal" means "relating to the stomach and intestines." Other examples of combining forms that are used in medical terms include "cardio-" (relating to the heart), "neuro-" (relating to the nerves), "hepat-" (relating to the liver), and "renal" (relating to the kidneys).
Combining forms are also used in other fields, such as chemistry, geology and other sciences to create compound words, and they are an important tool in building new terms in the field of medicine and biology, and many other fields.