iodine

iodine
[ˈʌɪədiːn, -ʌɪn, -ɪn]
noun

[mass noun]the chemical element of atomic number 53, a non-metallic element forming black crystals and a violet vapour(Symbol: I)
（化学元素）碘(符号: I)
■a solution of this in alcohol, used as a mild antiseptic
碘酒
A member of the halogen group, iodine occurs chiefly as salts in seawater and brines. As a constituent of thyroid hormones it is required in small amounts in the body, and deficiency can lead to goitre

语源

early 19th cent.: from French iode (from Greek iōdēs 'violet-coloured', from ion 'violet' + -eidēs 'like') + -ine