noun🔗ShareSacroA 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. "El médico examinó la parte baja de la espalda del paciente, centrándose en el sacro donde se conectaba con la pelvis.anatomybodymedicinephysiologypartstructurehumanorganChat with AIVocabulary GamePractice Reading