(anatomy) The hollow at the end of the scapula into which fits the humerus to make the shoulder joint

(anatomy) poplit (shallow depression located at the back of the knee joint)

(anatomy) The pharyngeal recess behind the ostium of the Eustachian tube.

(anatomy) A large, smooth, concave surface on the internal surface of the ilium.

(anatomy, neuroanatomy) A rhombus-shaped depression that is the anterior part of the fourth ventricle of the brain

(anatomy) A depression on the occipital below the inion.

(anatomy) A small triangular space beneath the apex of the orbit that is bounded above by the sphenoid bone and the orbital process of the palatine bone, in front by the maxilla, medially by the palatine bone, and behind by the pterygoid process of the sphenoid bone and that contains among other structures the pterygopalatine ganglion.

(anatomy) Synonym of piriform sinus.

(anatomy) Alternative spelling of piriform fossa.

(anatomy) A fossa that is bounded above by the plane of the zygomatic arch, laterally by the ramus of the mandible, and medially by the pterygoid plate, and that contains the masseter and pterygoid muscles and the mandibular nerve.