Is actinic a word?
The earliest known use of the adjective actinic is in the 1840s. OED's earliest evidence for actinic is from 1843, in the writing of John Herschel, mathematician and astronomer. actinic is a borrowing from Greek, combined with an English element.
The earliest known use of the adjective actinic is in the 1840s. OED's earliest evidence for actinic is from 1843, in the writing of John Herschel, mathematician and astronomer. actinic is a borrowing from Greek, combined with an English element.
