part of part of bone element anatomical cavity bone fossa Anatomical space that is a concavity, shallow depression, or groove on a bone.[TAO] UMLS:C0836913 Wikipedia:Fossa#Anatomy depression FMA:45791 VSAO:0005069 ZFA:0005388 groove AAO:0010439 TAO:0001743 General Anatomical term in FMA; not restricted to bone in ncit; surface feature in VSAO; note that entities named 'fossa' are cavities in FMA, hence placement here fossae depressions A depression or hollow in a bone[WP]. concavity concavities fossa UBERON:0004704