iodin
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) • Syn: iodine, I, atomic number 53 • Derivationally related forms: iodinate (for: iodine), iodize (for: iodine), iodise (for: iodine) • Hypernyms: chemical element, element, halogen • Hyponyms: iodine-131, iodine-125 • Substance Holonyms: seawater, saltwater, brine
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