posterior

This is a general anatomical term of direction or position. It is the equivalent of "backwards" or "at the back of" as in the femoral vessels pass posteriorly (i.e. backwards) to lie in the popliteal fossa behind the knee the adductor magnus muscle lies posterior to (i.e.behind) the adductor brevis muscle popliteal lymph nodes drain lymph from the posterior (i.e.back) surface of the leg.