Irradiate/ɪˈreɪdieɪt/ Definition 1 of 3Pro Tip 1/3Scientific Usage Used mainly in technical or scientific contexts, often related to health or preservation. Scientists irradiate seeds to study genetic mutations. Pro Tip 2/3Neutral Tone The term itself is neutral; the positive or negative connotation depends on the context. Irradiate the tumor, not healthy tissue. Pro Tip 3/3Directed Process Implies a controlled, intentional exposure to radiation, not accidental or natural. We must carefully irradiate this material.