1. a nonmetallic chemical element that is a dark gray solid at room temperature and is used in medicine and industry
Usage: symbol: I; atomic number: 53
2. a solution of iodine in alcohol, used as an antiseptic for minor cuts and wounds
Usage: also called tincture of iodine

Examples

• Iodine is essential for proper thyroid function in the human body.
• The nurse applied iodine to the wound to prevent infection.
• Salt is often fortified with iodine to prevent deficiency diseases.
• Iodine turns blue-black when it comes into contact with starch.
• Many countries require iodine to be added to table salt for public health reasons.