Energy transmitted either through streams or through waves. In medicine, radiation is used either in diagnostic ways (x-rays and scans) or as treatment (radiation therapy to reduce or kill tumors). A more general definition is the outward movement of something from a central point.

RADIATION: "The oncology center used radiation to treat her mother's cancer."
Cite this page: N., Pam M.S., "RADIATION," in PsychologyDictionary.org, April 28, 2013, https://psychologydictionary.org/radiation/ (accessed October 17, 2021).