n.large flaring bone forming one half of the pelvis; made up of the ilium and ischium and pubis
同义词：hipbone
英汉双解大词典
innominate bone
1.
N（名词）
either of the two bones that form the sides of the pelvis, consisting of three fused components, the ilium, ischium, and pubis 髋骨 (Nontechnical name hipbone)