oligodynamic

adjective
oli·​go·​dy·​nam·​ic | \ -dī-ˈnam-ik How to pronounce oligodynamic (audio) \

Medical Definition of oligodynamic

1 : active in very small quantities an oligodynamic germicide
2a : produced by minute quantities oligodynamic action of silver in disinfecting water
b : of or relating to the action of such quantities
3 : of, relating to, or being produced by the specific activity of an oligodynamic substance oligodynamic effects of metals on bacterial growth