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Iodine   /ˈaɪədˌaɪn/   Listen
noun
Iodine  n.  (Chem.) A nonmetallic element, of the halogen group of atomic number 53, 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 126.90. 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.






Collaborative International Dictionary of English 0.48








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"Iodine" Quotes from Famous Books



... all have complicated; reactions of their own. In the reds are rosanilines, toluidine xylidine, &c.; in the blues—phenyl-rosanilines, diphenylamine, toluidine, aldehyde, &c.; violets—rosaniline, mauve, phenyl, ethyl, methyl, &c.; greens—iodine, aniline, leucaniline, chrysotoluidine, aldehyde, toluidine, methyl-anilinine, &c.; yellows and orange—leucaniline, phenylamine, &c.; ...
— The Story of a Piece of Coal - What It Is, Whence It Comes, and Whither It Goes • Edward A. Martin

... result also proved the elementary gases, generally, to be highly transparent to radiant heat. This, again, led to the proof of the diathermancy of elementary liquids, like bromine, and of solutions of the solid elements sulphur, phosphorus, and iodine. A spectrum is now before you, and you notice that the transparent bisulphide of carbon has no effect upon the colours. Dropping into the liquid a few flakes of iodine, you see the middle of the spectrum cut away. By augmenting the quantity ...
— Six Lectures on Light - Delivered In The United States In 1872-1873 • John Tyndall

... he gathered, and saw a very few ovules, as he thinks, on the large and mostly rudimentary placenta. I shall be most curious to hear whether the other pod produces a good lot of seed. He says he regrets that he did not test the ovules with chemical agents: does he mean tincture of iodine? He suggests that in a state of nature the viscid matter may come to the very surface of stigmatic chamber, and so pollen-masses need not be inserted. This is possible, but I should think improbable. Altogether the case is very odd, and I am ...
— More Letters of Charles Darwin Volume II - Volume II (of II) • Charles Darwin

... more than once kept you informed of the inquiry concerning the effects of iodine on the human system, which has so long engaged the attention of several eminent chemists on the continent; and now have to report something further by M. Fourcault, whose communication thereupon to the Academie is entitled, ...
— Chambers' Edinburgh Journal - Volume XVII., No 422, New Series, January 31, 1852 • Various

... any distance on tour should carry some sort of first-aid equipment. It need not be elaborate, but should include bandages, a clean dressing (a first field dressing is the best and most compact), iodine and adhesive plaster, and some vaseline or boracic ointment. Even a scratch will go on bleeding on a cold day and be very tiresome. Accidents are miraculously few and far between in Ski-ing, considering the falls and the large number of people who ski. But they happen occasionally, and ...
— Ski-running • Katharine Symonds Furse


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