either of the two bones forming the sides of the pelvis, each consisting of three consolidated bones, the ilium, ischium, and pubis.
Origin
1700-10
British Dictionary definitions for innominate bone
innominate bone
noun
1.
either of the two bones that form the sides of the pelvis, consisting of three fused components, the ilium, ischium, and pubis Nontechnical name hipbone