GNU Collaborative International Dictionary of English

Found one definition

1.       
   ‖Mudar , n. [Hind. madār.] (Bot.) Either one of two asclepiadaceous shrubs (Calotropis gigantea, and Calotropis procera), which furnish a strong and valuable fiber.  The acrid milky juice is used medicinally. [Also spelled madar and muddar.]
   1913 Webster