co1=z1 is/are anterior (zootomy)/cranial/cephalic (anatomy)/superior (human anatomy) to z2 by margin z4, in body/object cl1=d3.
Standard anatomical term to avoid ambiguity, but not restricted to anatomical objects. In most animals the same as 'in front of' (=crane), but in humans the same as 'above' (=gapru). See also anterior/superior absolute position (claco'uklo), anterior/superior relative position (claco'umau), posterior/inferior end (claco'a), anteroposterior (A-P) axis (selcla), ventral/anterior end (befco'u), dorsal/posterior end (tolbefco'u/bekpyco'u).