Final answer:
The combining form 'poster/o' (poster/ior) in medical terminology typically refers to the back side of the body, which is also known as the dorsal side.
Step-by-step explanation:
The combining form 'poster/o' (poster/ior) in medical terminology typically refers to the back side of the body, which is also known as the dorsal side. This term helps describe the position or direction of a body structure in relation to the back of the body.