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irradiance (adj.)
[irradiance 词源字典]
1660s, from
irradiant
(1520s), from Latin
irradiantem
(nominative
irradians
), present participle of
irradiare
(see
irradiate
). Related:
Irradiancy
(1640s).
[irradiance etymology, irradiance origin, 英语词源]
[irradiance 词源字典]