1. ischium

noun. one of the three sections of the hipbone; situated below the ilium.


  • pelvic girdle
  • os ischii
  • os
  • pelvis
  • bone
  • hip joint
  • articulatio coxae
  • pelvic arch
  • coxa
  • hip


  • boneless
  • uninformed

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Example sentences of the word ischium

1. Noun, singular or mass
It runs forward from the front of the sacrum and downward to attach to the tubercle of the ischium, a bony prominence on one of the bones that make up the ring of the pelvis.