"Inert material" refers to a substance that does not react or interact with other substances. It remains stable and unchanging, having little to no effect on its surroundings. Full definition
Intraocular lenses are made of inert materials like polymethylmethacrylate (PMMA) with flexible haptics to stabilize the lens within the capsular bag. (veterinaryvision.com)
3D printing excels at creating intricately detailed 3D structures, typically from inert materials like plastic or metal. (seas.harvard.edu)
Although graphite is known as one of the most chemically inert materials, we have found that graphene, a single atomic plane of graphite, can react with atomic hydrogen, which transforms this highly conductive zero - overlap semimetal into an insulator. (science.sciencemag.org)