Definition of glenoid fossa in US English:

glenoid fossa

(also glenoid cavity)


  • A shallow depression on a bone into which another bone fits to form a joint, especially that on the scapula into which the head of the humerus fits.

    • ‘The humeral head can dislocate anteriorly, posteriorly or inferiorly in relation to the glenoid fossa.’
    • ‘The shoulder joint is a synovial, ball-and-socket type joint formed by the head of the humerus and glenoid cavity of the scapula.’
    • ‘This injury is not to be confused (as it commonly is) with a shoulder dislocation, which is when the humerus pops out of the glenoid fossa on the scapula.’
    • ‘This joint is formed where your upper arm bone meets the glenoid cavity, which is part of your shoulder blade (scapula).’
    • ‘The glenohumeral joint represents the articulation of the humerus with the glenoid fossa, and it is the most mobile joint in the body.’


Early 18th century: glenoid from French glénoïde, from Greek glēnoeidēs, from glēnē ‘socket’.


glenoid fossa

/ˈɡlēnoid ˈfäsə/