01 n. The science which treats of rays of light, especially of the actinic or chemical rays.
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1.
The science which treats of rays of light, especially of the actinic or chemical rays.
Entry
1 sense
Webster, 1913
Actinology
· Ac·ti·nol·o·gy
· IPA /ˌæk.tɪˈnɑ.lə.d͡ʒi/