An agent that causes or promotes excretion of waste material, foreign or toxic substances, etc.
rare Originally: the determinant associated with a system of equations. In later use: the resultant of a system of equations, especially that of two polynomials.
Causing or promoting excretion. Now chiefly historical.
Mid 19th century. From classical Latin ēlīminant-, ēlīmināns, present participle of ēlīmināre eliminate.