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il·i·um | \ ˈi-lē-əm 
\
\ plural ilia\ ˈi-lē-ə \
\Definition of ilium
: the broad, dorsal, upper, and largest of the three principal bones composing either half of the pelvis
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ilium
nounil·i·um | \ ˈil-ē-əm \
\ plural ilia\ -ē-ə \
\Medical Definition of ilium
: 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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Time Traveler for ilium
The first known use of ilium was in 1706
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