"iodine" in the noun sense
1. iodine, iodin, I, atomic number 53
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)
2. tincture of iodine, iodine
a tincture consisting of a solution of iodine in ethyl alcohol applied topically to wounds as an antiseptic
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