iodine definition

  • noun:
    • A lustrous, grayish-black, corrosive, poisonous halogen element having radioactive isotopes, specially we 131, used as a medical tracer as well as in thyroid gland illness diagnosis and treatment. Iodine substances are used as germicides, antiseptics, and dyes. Atomic number 53; atomic body weight 126.9045; melting point 113.5°C; boiling point 184.35°C; specific gravity (solid, at 20°C) 4.93; valence 1, 3, 5, 7. See Table at element.
    • An antiseptic planning containing iodine in option, always treat injuries.
    • A chemical factor (expression: we) with an atomic wide range of 53; among halogens.
    • An antiseptic integrating the factor.
    • An iodide.
    • A nonmetallic factor, associated with the halogen group of atomic number 53, happening constantly in combination, as in the iodides. Whenever isolated its in the form of dark-gray metallic scales, resembling plumbago, smooth but brittle, and emitting a chlorinelike smell. Image I. Atomic weight 126.90. If heated, iodine volatilizes in beautiful violet vapors.
    • Chemical representation, we; atomic weight, 126.9. In chem., a peculiar non-metallic elementary solid substance, developing one of several selection of halogens.
    • a nonmetallic element of the halogens; utilized especially in medication and photography plus in dyes; occurs normally only in combo in tiny quantities (such as sea-water or rocks)
    • a tincture composed of an answer of iodine in ethyl alcoholic beverages; used externally to injuries as an antiseptic

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