An instrument that measures and records the total amount of radiation or a chemical substance absorbed by a person or object.
From 'dose' (Greek 'dosis' = a giving) + '-meter' (from Greek 'metron' = measure). The compound was created in the modern era to name this scientific instrument.
Dosimeters are small badges worn by nuclear workers that change color if exposed to radiation—they're a silent safety system that's probably saved thousands of lives by catching dangerous exposures early.
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