the surface of a structure or part of the body that faces forward. The NA recognizes an anterior surface (facies anterior …) without qualification on the following structures: pancreas (… pancreatis [NA]); patella (… patellae [NA]); prostate (… prostatae [NA]); radius (… radii [NA]); suprarenal gland (… glandulae suprarenalis [NA]); ulna (… ulnae [NA]). Syn: facies anterior [NA].