Definition of postscapular in US English:

postscapular

adjective

Anatomy
rare
  • Situated behind or below the spine of the scapula; specifically designating a fossa (the infraspinous fossa) formed by the lower surface of the spine of the scapula and the lower part of the dorsal surface of the scapula.

Origin

Late 19th century; earliest use found in John S. Billings (1838–1913).