Main Entry: ra·di·a·tion

Pronunciation: \ˌrā-dē-ˈā-shən\

Function: noun

Date: 15th century

1 a : the action or process of radiating b : the process of emitting radiant energy in the form of waves or particles c (1) : the combined processes of emission, transmission, and absorption of radiant energy (2) : the transfer of heat by radiation — compare conduction, convection
2 a : something that is radiated b : energy radiated in the form of waves or particles
3 : radial arrangement
4 : adaptive radiation
5 : radiator

— ra·di·a·tion·al \-shnəl, -shə-n^əl\ adjective

— ra·di·a·tion·less \-shən-ləs\ adjective

— ra·di·a·tive \ˈrā-dē-ˌā-tiv\ adjective