noun🔗Share仙骨A large triangular bone at the base of the spine, located between the two ilia (wings of the pelvis) and formed from vertebrae that fuse in adulthood."The doctor examined the patient's lower back, focusing on the sacrum where it connected to the pelvis. "医者は患者の腰部を診察し、骨盤と接続する仙骨に焦点を当てた。anatomybodymedicinephysiologypartstructurehumanorganChat with AIVocabulary GamePractice Reading