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iodine

noun
/ˈaɪədiːn/
/ˈaɪədaɪn/
[uncountable]
(symbol I)
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  1. a chemical element. Iodine is a substance found in seawater. A liquid containing iodine is sometimes used as an antiseptic (= a substance used on wounds to prevent infection).Topics Physics and chemistryc2
    Word Originearly 19th cent.: from French iode (from Greek iōdēs ‘violet-coloured’, from ion ‘violet’ + -eidēs ‘like’) + -ine.

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