I'ODIC, adjective iodic acid is a compound of iodin and oxygen.

I'ODIDE, noun A compound of iodin with a metal or other substance.

I'ODIN

I'ODINE, noun [Gr. resembling a violet.] In chimistry, a peculiar substance recently discovered by Courtois, a manufacturer of salt-peter in Paris. It is obtained from certain sea-weeds or marine plants. At the ordinary temperature of the atmosphere it is a solid, apparently a simple substance, at least hitherto undecomposed. It is incombustible, but in combining with several bodies, it exhibits the phenomena of combustion; hence it has been considered a supporter of combustion. Like chlorine, it destroys vegetable colors, but with less energy. Its color is bluish black or grayish black, of a metallic luster. It is often in scales, resembling those of micaceous iron ore; sometimes in brilliant rhomboidal plates, or in elongated octahedrons. Its taste is acrid, and it is somewhat poisonous. It is fusible at 225 deg. of Fahrenheit. The color of its vapor is a beautiful violet, whence its name.

I'ODINE, n. [Gr. resembling a violet.] In chimistry, a peculiar substance recently discovered by Courtois, a manufacturer of salt-peter in Paris. It is obtained from certain sea-weeds or marine plants. At the ordinary temperature of the atmosphere it is a solid, apparently a simple substance, at least hitherto undecomposed. It is incombustible, but in combining with several bodies, it exhibits the phenomena of combustion; hence it has been considered a supporter of combustion. Like chlorine, it destroys vegetable colors, but with less energy. Its color is bluish black or grayish black, of a metallic luster. It is often in scales, resembling those of micaceous iron ore; sometimes in brilliant rhomboidal plates, or in elongated octahedrons. Its taste is acrid, and it is somewhat poisonous. It is fusible at 225 deg. of Fahrenheit. The color of its vapor is a beautiful violet, whence its name.

I'ODOUS, adjective iodous acid is a compound of iodin and oxygen, containing less of the latter than iodic acid.

IOD'URET, noun A compound of iodin and a metallic or other base.

I'OLITE, noun [Gr. a violet, and stone.] A mineral of a violet blue color, with a shade of purple or black, called also dichroit and cordierite. It occurs in regular six-sided prisms. Its varieties are peliom and steinheilite.

[Note. By the regular principles of pronouncing the Greek iota and the Shemitic jod, this word ought to be pronounced yolite.]

ION'IC, adjective [from Ionia.] The ionic order, in architecture, is that species of column named from Ionia, in Greece. It is more slender than the Doric and Tuscan, but less slender and less ornamented than the Corinthian and Composite. It is simple, but majestic; its highth is 18 modules, and that of the entablature four and a half.

1. The ionic dialect of the Greek language, is the dialect used in Ionia.

2. The ionic sect of philosophers, was that founded by Thales of Miletus, in Ionia. Their distinguishing tenet was, that water is the principle of all natural things.

3. Denoting an airy kind of music. The ionic or Ionian mode was, reckoning from grave to acute, the second of the five middle modes.