Iodine Definition

īə-dīn, -dĭn, -dēn
noun
A nonmetallic chemical element, one of the halogens, consisting of grayish-black crystals that volatilize into a violet-colored vapor: used as an antiseptic, in the manufacture of dyes, in photography, etc.: symbol, I; at. no. 53: a radioactive isotope (iodine-131) is used esp. in the diagnosis and treatment of thyroid function, in internal radiation therapy, and as a tracer.
Webster's New World
Tincture of iodine, used as an antiseptic.
Webster's New World
A lustrous, purple-black, corrosive, poisonous halogen occurring as a diatomic molecule, I2 , that easily sublimes to give a purple gas and is a trace element essential for proper thyroid function. Radioactive isotopes, especially I-131, are used as medical tracers and in thyroid disease diagnosis and therapy. Iodine compounds are used as germicides, antiseptics, and dyes. Atomic number 53; atomic weight 126.9045; melting point 113.7°C; boiling point 184.4°C; density of gas 11.27 grams per liter; specific gravity (solid, at 20°C) 4.93; valence 1, 3, 5, 7.
American Heritage
An antiseptic preparation containing iodine in solution, used to treat wounds.
American Heritage
Synonyms:
  • tincture-of-iodine
  • atomic number 53
  • i
  • iodin
verb

To treat with iodine.

Wiktionary
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Other Word Forms of Iodine

Noun

Singular:
iodine
Plural:
iodines

Origin of Iodine

  • French iode iodine (from Greek ioeidēs violet-colored) (ion violet) (Latin viola viola2) (-oeidēs -oid) –ine

    From American Heritage Dictionary of the English Language, 5th Edition

  • French iode iodine (from Greek ioeidēs violet-colored) (ion violet) (Latin viola viola2) (-oeidēs -oid) –ine

    From American Heritage Dictionary of the English Language, 5th Edition

  • From French iode, from Ancient Greek ἰοειδής (ioeidēs, “violet”) + -ine

    From Wiktionary

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iodine