Synset
a concavity in a surface (especially an anatomical depression)
<noun.shape>
fossa
pit
lexical pointers
derivationally related form
pit
semantic pointers
hyponym
glenoid fossa, glenoid cavity
glenoid fossa, mandibular fossa
pit of the stomach, epigastric fossa
hypernym
cavity, bodily cavity, cavum
concave shape, concavity, incurvation, incurvature