Definitions for: Iodine


[n] a tincture consisting of a solution of iodine in ethyl alcohol; applied topically to wounds as an antiseptic
[n] 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)



Webster (1913) Definition: I"o*dine (?; 104), n. [Gr. ? violetlike; ? a violet + ?
form: cf. F. iode, iodine. The name was given from the violet
color of its vapor. See Violet, Idyl.] (Chem.)
A nonmetallic element, of the halogen group, occurring always
in combination, as in the iodides. When isolated it is in the
form of dark gray metallic scales, resembling plumbago, soft
but brittle, and emitting a chlorinelike odor. Symbol I.
Atomic weight 126.5. If heated, iodine volatilizes in
beautiful violet vapors.

Note: Iodine was formerly obtained from the ashes of seaweed
(kelp or varec), but is now also extracted from certain
natural brines. In the free state, iodine, even in very
minute quantities, colors starch blue. Iodine and its
compounds are largely used in medicine (as in
liniments, antisyphilitics, etc.), in photography, in
the preparation of aniline dyes, and as an indicator in
titration.

Iodine green, an artificial green dyestuff, consisting of
an iodine derivative of rosaniline; -- called also {night
green}.

Iodine scarlet, a pigment of an intense scarlet color,
consisting of mercuric iodide.

Iodine yellow, a brilliant yellow pigment, consisting of
plumbic iodide.

Synonyms: atomic number 53, I, iodin, tincture of iodine

See Also: antiseptic, brine, chemical element, element, halogen, iodine-125, iodine-131, saltwater, seawater, tincture

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