activated

ac*ti*vate

verb

{bc}to make {a_link|active} or more active: such as

{bc}to make (something, such as a molecule) reactive or more reactive

{bc}to convert (something, such as a provitamin) into a biologically active derivative

activated carbon

noun

{bc}a highly adsorbent powdered or granular carbon made usually by carbonization and chemical activation and used chiefly for purifying by adsorption