The sacral plexus refers to a nerve network that supplies the lower limbs and pelvis. It is made up of the spinal nerves L4 through S4. Synonyms for this term may include the sacral portion of the lumbo-sacral plexus, the sacral nerve plexus, or the sacral nerves. Other related terms referring to the area include the sacral region, the sacrum, and the pelvic girdle. Understanding these terms and their synonyms is important in the medical field as they aid in accurate communication and diagnoses. It is important to use these terms correctly when referring to conditions or injuries affecting the sacral plexus.