Result from Foreign Dictionaries (2 entries found)
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Actinism \Ac"tin*ism\, n. [Gr. ?, ? ray.]
The property of radiant energy (found chiefly in solar or
electric light) by which chemical changes are produced, as in
From WordNet (r) 3.0 (2006) [wn]:
n 1: the property of radiation that enables it to produce
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