单词 diactinic 释义 diactinic, a. Optics.|daktnk|[f. di-3 = dia-1 +Gr. ἀ- a ray + -ic.]Having the property of transmitting the actinic rays of light.1867W. A. Miller Elemen. Chem. i. (ed. 4) 230 Rock-salt, fluor-spar, water..are almost as diactinic..as...