Definition of ischium in English:

Share this entry


Pronunciation: /ˈiskēəm/

noun (plural ischia /-kēə/)

The curved bone forming the base of each half of the pelvis.
Example sentences
  • After further dissection, the surgeon exposes the pubic bone and identifies the ischium by palpation.
  • The inferior, posterior portion of the coxal bone is the ischium.
  • The pelvic component of the hip joint is called the acetabulum, which has contributions from the ischium, ilium and pubis.



Pronunciation: /ˌiskēˈadik/
Example sentences
  • The popliteal is sometimes a continuation not of the femoral but of a sizable ischiadic artery.
  • The ischiadic artery, the embryonic axis artery, ‘arises’ from the inferior gluteal artery.
  • In cases where the ischiadic artery persists as the main artery of the lower limb the external iliac is usually poorly developed.


Pronunciation: /ˈiskēəl/
Example sentences
  • The sacrotuberous ligament is a cartilaginous attachment of the sacrum to the ischial tuberosity.
  • Defect or nonunion of the pubic and ischial rami is occasionally observed.
  • In adolescent patients with a history of proximal hamstring injury and current ischial tenderness, a radiograph of the pelvis should be performed.


Early 17th century: from Latin, from Greek iskhion 'hip joint', later 'ischium'.

For editors and proofreaders

Syllabification: is·chi·um

Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.