radiosensitive /-sen″sitiv/ [L, radiare + sentire, to feel] , 1. capable of being changed by or reacting to radioactive emissions such as x-rays, alpha particles, or gamma rays. Compare radioresistant. See also radioactivity. 2. a cell characteristic indicating the degree of susceptibility to changes produced by ionizing radiation. For example, immature cells are said to be more radiosensitive than mature cells; cells of the nervous system are less radiosensitive than blood cells.
