Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

ischium

play
noun is·chi·um \ˈis-kē-əm\

Definition of ischium

plural

ischia

play \-ə\
  1. :  the dorsal and posterior of the three principal bones composing either half of the pelvis

ischial

play \-əl\ adjective


Origin and Etymology of ischium

Latin, hip joint, from Greek ischion


First Known Use: 1646


Medical Dictionary

ischium

play
noun is·chi·um \ˈis-kē-əm\

Medical Definition of ischium

plural

ischia

\-ə\play
  1. :  the dorsal and posterior of the three principal bones composing either half of the pelvis consisting in humans of a thick portion, a large rough eminence on which the body rests when sitting, and a forwardly directed ramus which joins that of the pubis



Illustration of ischium


Learn More about ischium

  1. Medical Dictionary: Definition of ischium Britannica.com: Encyclopedia article about ischium


Seen and Heard

What made you want to look up ischium? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

to lessen in amount, effect, or force

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

two-chairs-on-a-pier-by-the-ocean-in-summer

Which of the following words means “of or relating to summer”?

vernal estival hiemal brumal
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ