Radiation
/ˌreɪ.diˈeɪ.ʃən/noun
The emission of energy as electromagnetic waves or as moving subatomic particles.
Did you know?The word 'radiation' is linked to the ancient concept of 'rays,' which in some esoteric traditions symbolize divine illumination or hidden powers.
Etymological Timeline
Proto-Indo-European
PIE
*radi-
“to shine, beam, or emit light”
Latin
Latin
radiatio
“a sending forth of rays, emission of light or energy”
Old French
Old French
radiacion
“the action of sending out rays or beams”
Middle English
Middle English
radiacioun
“transmission of energy in the form of rays”
Modern English
English
radiation
“the act of emitting energy in the form of waves or particles”