单词	ilium
释义	ilium noun il·​i·​um ˈi-lē-əm  plural ilia ˈi-lē-ə  : the broad, dorsal, upper, and largest of the three principal bones composing either half of the pelvis Example Sentences Recent Examples on the Web The ilium looks like those of a living group of frogs called the helmeted frogs. Lucas Joel, New York Times, 23 Apr. 2020 The last bones to go, the ilium and sacrum (the big hip bones atop the skeleton) are the heaviest bone structure. Steve Johnson And Phil Geib, chicagotribune.com, 3 Feb. 2018 Word History Etymology New Latin, alteration of Latin ilia First Known Use 1706, in the meaning defined above Medical Definition ilium noun il·​i·​um ˈil-ē-əm  plural ilia -ē-ə  : the dorsal, upper, and largest one of the three bones composing either lateral half of the pelvis that in humans is broad and expanded above and narrower below where it joins with the ischium and pubis to form part of the acetabulum
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