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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
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