Adjective
1. subjected to a physical (or chemical) treatment or action or agent;
"the sludge of treated sewage can be used as fertilizer""treated timbers resist rot""treated fabrics resist wrinkling"2. (of a specimen for study under a microscope) treated with a reagent or dye that colors only certain structures
3. given medical care or treatment;
"a treated cold is usually gone in 14 days; if left untreated it lasts two weeks"4. made hard or flexible or resilient especially by heat treatment;
"a sword of tempered steel""tempered glass"