Meaning

noun a nonmetallic element belonging to the halogens; used especially in medicine and photography and in dyes; occurs naturally only in combination in small quantities (as in sea water or rocks)

noun a tincture consisting of a solution of iodine in ethyl alcohol; applied topically to wounds as an antiseptic

originFrom French iode + -ine, from Ancient Greek ἰοειδής (ioeidḗs, “violet”). Coined by British chemist Humphry Davy in 1814.

Etymology from Wiktionary, CC BY-SA 3.0