dosimeter

This term is primarily used in technical, medical, and industrial contexts, specifically within radiology, nuclear physics, and occupational safety. It carries a neutral, clinical tone and is rarely encountered in casual conversation unless discussing workplace safety or scientific research.

Because it refers to a specific piece of hardware, it is used as a standard countable noun. Users should be aware that while "dosimetry" refers to the science of measuring radiation, "dosimeter" refers exclusively to the physical instrument used for that purpose.