kidney vetch: perennial Eurasian herb having heads of red or yellow flowers and common in meadows and pastures; formerly used medicinally for kidney disorders
herb: a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests
epidural anesthesia: regional anesthesia resulting from injection of an anesthetic into the epidural space of the spinal cord; sensation is lost in the abdominal and genital and pelvic areas; used in childbirth and gynecological surgery