2. Adjective. (anatomy) Of or pertaining to the relation between anterior and posterior ¹
¹ Source: wiktionary.com
Medical Definition of Anteroposterior
1. 1. Relating to both front and rear. 2. In X-ray imaging, describing the direction of the beam through the patient from anterior to posterior, e.g., an A-P view of the abdomen. (05 Mar 2000)