Yahoo Web Search

Search results

1. Dictionary

   radiation

   /ˌreɪdɪˈeɪʃn/

   noun

   • 1. the emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles which cause ionization.
   • ▪ the energy transmitted by radiation: "background radiation"
   • 2. divergence out from a central point, in particular evolution from an ancestral animal or plant group into a variety of new forms: "evolution is a process of radiation not progression"

   Word Origin late Middle English (denoting the action of sending out rays of light): from Latin radiatio(n-), from radiare ‘emit rays’ (see radiate).

   Scrabble Points: 10

   • R

     1

   • A

     1

   • D

     2

   • I

     1

   • A

     1

   • T

     1

   • I

     1

   • O

     1

   • N

     1

   Powered by Oxford Dictionaries

   More definitions, origin and scrabble points