Definition of ischium in English:


Pronunciation /ˈiskēəm/ /ˈɪskiəm/


  • The curved bone forming the base of each half of the pelvis.

    ‘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.’
    • ‘I also noticed another protruding bone called the ischium and I became very excited because I knew that this was not a fish but a tetrapod.’
    • ‘In 1992, I developed a serious ulcer on my right ischium.’
    • ‘The proximal tibia is the most common site followed by the femur, fibula, and ischium.’


Early 17th century from Latin, from Greek iskhion ‘hip joint’, later ‘ischium’.