saxifrage
noun[L. saqxifraga; composed of saxum, a stone, and frango, to break.]
A medicine that has the property of breaking or dissolving the stone in the bladder. But in botany, a genus of plants of many species. The burnet saxifrage is of the genus Pimpinella; the golden saxifrage is of the genus Chrysoplenium; the meadow saxifrage is of the genus Peucedanum.