non-radioactive
non-radioactive — adjective
1. describing a material or substance that gives off no harmful radiation, so it is
describing a material or substance that gives off no harmful radiation, so it is safe to handle around people and food.
The hospital uses non-radioactive markers to track blood flow in young patients.
attributive: non-radioactive + noun (markers, tracers, samples)
Aylin's lab switched to non-radioactive dyes after a junior staff member raised safety concerns.
common collocation: non-radioactive dye / tracer / isotope
Most metals in your kitchen, like iron and copper, are completely non-radioactive.
The factory promised the soil around the river was now non-radioactive and safe for farming.
Vivek explained that the glow-in-the-dark paint on the watch is non-radioactive and harmless.
- radioactive
direct opposite — gives off harmful radiation
用法筆記
Often used to reassure readers about safety: pairs typically with nouns like 'tracer', 'dye', 'isotope', 'material', 'sample', or with verbs of becoming/proving ('proved non-radioactive', 'remains non-radioactive').