1. a deep concavity in the temporal bone at the root of the zygomatic arch that receives the condyle of the mandible • Syn: mandibular fossa • Hypernyms: pit, fossa • Part Holonyms: temporal bone, os temporale 2. the concavity in the head of the scapula that receives the head of the humerus to form the shoulder joint • Syn: glenoid cavity • Hypernyms: pit, fossa • Part Holonyms: scapula, shoulder blade, shoulder bone