Main Entry: sa·crum

Pronunciation: \ˈsa-krəm, ˈsā-\

Function: noun

Inflected Form(s): plural sa·cra \ˈsa-krə, ˈsā-\

Etymology: New Latin, from Late Latin os sacrum last bone of the spine, literally, holy bone, translation of Greek hieron osteon

Date: 1753

: the part of the vertebral column that is directly connected with or forms a part of the pelvis and in humans consists of five fused vertebrae