1. not exposed to radiation or electromagnetic energy
Usage: technical; scientific

Examples

• The unirradiated food samples were kept as controls in the experiment.
• Scientists compared irradiated and unirradiated materials to measure the effects.
• The unirradiated cells showed normal growth patterns.
• Unirradiated gemstones retain their natural color.
• The laboratory stored unirradiated specimens in a separate container.
• Researchers needed unirradiated tissue samples for comparison.