ischium

American  

[is-kee-uhm] / ˈɪs ki əm /

noun

Anatomy.

plural

ischia

1. the lower portion of either innominate bone.

2. either of the bones on which the body rests when sitting.

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ischium British  

/ ˈɪskɪəm /

noun

1. one of the three sections of the hipbone, situated below the ilium

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ischium Scientific  

/ ĭs′kē-əm /

plural

ischia

1. The lowest of the three major bones that constitute each half of the pelvis, distinct at birth but later becoming fused with the ilium and pubis.

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Usage

What is ischial tuberosity? Ischial tuberosity is the name for the part of the pelvis that supports a person while sitting. How to pronounce ischial tuberosity[ is-kee-uhl too-buh-ros-i-tee ]

Other Word Forms

• ischiadic adjective
• ischial adjective
• ischiatic adjective

Etymology

Origin of ischium

1640–50; < Latin < Greek ischíon hip-joint

Example Sentences

Its ischium, a pelvic bone, has a strong kink in it, compared to the more banana-like ischium from other fossils.

From Science Magazine • Jun. 20, 2024

In adults, the hip bones, or coxal bones, are formed by the fusion of three pairs of bones: the ilium, ischium, and pubis.

From Textbooks • Jun. 9, 2022

What is the large opening in the bony pelvis, located between the ischium and pubic regions, and what two parts of the pubis contribute to the formation of this opening?

From Textbooks • Jun. 19, 2013

The ischium forms the posteroinferior region of each hip bone.

From Textbooks • Jun. 19, 2013

In such a Dinosaur as the American carnivorous Ceratosaurus the two bars of the pubis and ischium remain separate and diverging, and there is no film of bone extending over the interspace between them.

From Dragons of the Air An Account of Extinct Flying Reptiles by Seeley, H. G.