Definition of postacetabular in US English:

postacetabular

adjective

Anatomy Zoology
  • 1Situated behind an acetabulum, originally especially the socket of the hip bone.

  • 2Specifically designating a gland in a trematode posterior to the acetabulum or sucker by which it attaches itself to its host.

Origin

Mid 19th century; earliest use found in Richard Owen (1804–1892), comparative anatomist and palaeontologist.