radiation

noun

The transfer of energy via radiation.

The process of radiating waves or particles.

The shooting forth of anything from a point or surface, like diverging rays of light.

Radioactive energy.

(evolutionary theory, countable) A rapid diversification of an ancestral species into many new forms.

(often) Ellipsis of electromagnetic radiation. [Radiation (quantized as photons) consisting of oscillating electric and magnetic fields oriented perpendicularly to each other, moving through space.]

Roots

radiusradi- · Latin · ray, spoke

Synonyms for radiation

irradiationn emissionn irradiancen radiancyn actinismn

Synonyms & related words for radiation

Find synonyms, related words, and the definition of radiation — including irradiation, emission, irradiance, radiancy, actinism. Dendril is a free visual thesaurus that shows them on an interactive map where stronger matches sit closer to the center — no signup, no ads.

Words related to radiation

Explore words related to radiation — words associated with it, words that go with it, and its nearest matches in meaning. Related words include radioactivity, radiational, radiotherapy, actinotherapy, irradiative, radioactive, radioactivate, nonionizing. Click any word to make it the center of the map and keep exploring the web of connections.

Synonyms for radiation

Common synonyms for radiation include irradiation, emission, irradiance, radiancy, actinism — words that share a close meaning. Hover or tap any word on the map for its definition and part of speech.

Where does radiation come from?

The word radiation breaks down into one root of Latin origin: the root radi-, from Latin radius (“ray, spoke”). Explore each root to see other English words built from the same source.