Definition of iodine noun from the Oxford Advanced Learner's Dictionary

 

iodine

 noun
noun
BrE BrE//ˈaɪədiːn//
 
; NAmE NAmE//ˈaɪədaɪn//
 
[uncountable](symbol I)
 
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a chemical element. Iodine is a substance found in sea water. A liquid containing iodine is sometimes used as an antiseptic (= a substance used on wounds to prevent infection). Word Origin early 19th cent.: from French iode (from Greek iōdēs ‘violet-coloured’, from ion ‘violet’ + -eidēs ‘like’) + -ine.
See the Oxford Advanced American Dictionary entry: iodine