|1.||the act or process of irradiating or the state of being irradiated|
|2.||the apparent enlargement of a brightly lit object when it is viewed against a dark background|
|3.||a shaft of light; beam or ray|
|a. the therapeutic or diagnostic use of radiation, esp X-rays|
|b. exposure of a patient to such radiation|
|5.||radiation another name for irradiance|
irradiation ir·ra·di·a·tion (ĭ-rā'dē-ā'shən)
Exposure or subjection to the action of radiation for diagnostic or therapeutic purposes.
Medical treatment by exposure to radiation.
The spread of a nervous impulse beyond the usual path of conduction.