You searched for: “anteroposterior”
anteroposterior, AP
From the front to the back, as opposed to posteroanteror.

When a chest X-ray is taken with the patient's back against the film plate and the X-ray machine is in front of the patient, it is referred to as an AP, or anteroposterior, view.

This entry is located in the following unit: Medical Orientation Words with Reference to the Body (page 1)