Meaning of actinism in English:


Pronunciation /ˈaktɪnɪz(ə)m/

See synonyms for actinism on



See actinic

‘Optical radiation may cause chemical changes in living or non-living materials: this property is called actinism and radiation capable of causing such changes is referred to as actinic radiation.’
  • ‘The author here suggests the introduction of a useful word, radiance, to express the light, radiant heat, and actinism of the sun, which are evidently modifications of the same form of energy.’
  • ‘The germination of seeds in the spring is dependent upon the variations in the amount of actinism or chemical influence of light and heat.’