A term denoting the direction of view or progression, from posterior to anterior, through a part. ... (05 Mar 2000) ... 
(pos″tәr-o-an-tēr´e-әr) directed from the back toward the front; called also dorsoventral.
(PA) Type: Term Pronunciation: pos′tĕr-ō-an-tēr′ē-ŏr Definitions: 1. A term denoting the direction of view or progression, from posterior to anterior, through a part.
Posteroanterior: From back to front. A chest x-ray taken with the chest against the film plate and the x-ray machine behind the patient is a posteroanterior (PA) view. As opposed to anteroposterior (AP). For a more complete listing of terms used in medicine for spatial orientation, please see the entry to 'Anatomic Orientation Terms'.
posteroanterior From back to front, or from the posterior to the anterior surface; such as, the direction of a radiographic projection.