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

The large opening in the anteroinferior hip bone between the ischium and pubis is the obturator foramen.

From Textbooks • Jun. 19, 2013

The ilium forms the large, fan-shaped superior portion, the ischium forms the posteroinferior portion, and the pubis forms the anteromedial portion.

From Textbooks • Jun. 19, 2013

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 anterior margin of the ilium, however, is sometimes a little more equally rounded on both sides than in the rock-pigeon, The ischium is also frequently rather more elongated.

From The Variation of Animals and Plants Under Domestication, Vol. I. by Darwin, Charles