| Adj. | 1. | untreated - not given medical care or treatment; "an untreated disease"; "the untreated wounded lay on makeshift cots" Antonyms: treated - given medical care or treatment; "a treated cold is usually gone in 14 days; if left untreated it lasts two weeks" |
| 2. | untreated - not subjected to chemical or physical treatment; "an untreated fabric" Antonyms: treated - 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" | |
| 3. | untreated - (of a specimen for study under a microscope) not treated with a reagent or dye |