- 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
- tincture of iodine, used as an antiseptic
Origin of iodineFrench iode, iodine (; from Classical Greek i?d?s, violetlike ; from ion, a violet + eidos, form: see -oid) + -ine
- Symbol I 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. See Periodic Table.
- An antiseptic preparation containing iodine in solution, used to treat wounds.
Origin of iodineFrench iode, iodine (from Greek ioeid&emacron;s, violet-colored : ion, violet; akin to Latin viola; see viola2 + -oeid&emacron;s, -oid) + –ine2.
(usually uncountable, plural iodines)
Note that the chemical symbol J (not I) is sometimes used in German chemistry texts.
(third-person singular simple present iodines, present participle iodining, simple past and past participle iodined)
- To treat with iodine.
From French iode, from Ancient Greek ἰοειδής (ioeidēs, “violet”) + -ine