Sacrum

имя существительное [анатомия] крестец

Большой англо-русский словарь

Sacrum

анатомия крестец

Англо-русский научно-технический словарь

Sacrum

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

Merriam-Webster's Collegiate Dictionary