Irish Sea
a body of water lying between the N. of Ireland and the N. of erally remarkable for their large, yellow, England, with the S. W. counties of Scotland on the N. It is connected with white, or blue flowers, and sword-like leaves. They abound in Europe, but are rare in America. The rhizomes of several species are more or less purgative and emetic. Those of I. florentina, palland germanica a violet odor, and are used in perfumery for imparting an agreeable odor to the breath, and by the French especially for making issue peas. These rhizomes, dried and scraped, constitute the orris root of the shops. The roasted seeds of I. pseudacora, the yellow flag, have been recommended as a substitute for coffee, but they do not appear to have any of the valuable properties of that beverage.
The genus is so named on account of the variety of colors exhibited by it.
In anatomy, the anterior part of the choroid coat of the eye, with superadded muscular fibers.
In jewelry, the name given by French jewelers to limpid and transparent stones, but chiefly to rock crystal when reflecting prismatic colors like opal, by means of natural internal flaws.
IRISCOPE (I'ri-skōp), an instrument invented by Dr. Reade for exhibiting the prismatic colors. It consists of a plate of polished black glass, having its surface smeared by a solution of soap, and dried by wash leather. If the breath be directed through a tube upon the glass, the vapor will be deposited in colored rays.