Final answer:
The main purpose of using the combining form in medical terminology is to increase precision and reduce medical errors.
Step-by-step explanation:
The main purpose of using the combining form in medical terminology is to increase precision and reduce medical errors. Anatomical terms derive from ancient Greek and Latin words, and by using precise anatomical terminology, ambiguity is eliminated. For example, using anatomical terms can help specify the exact location of a scar, such as whether it is on the palm-side or back-side of the wrist.