chloasma (kloazma)

[NL., Gr. as if * χλόασμα, ton, 1838), «Gr. χλοηφάγος, gra -eating, are about 6 species. chlor-, chloro-. [NL., etc., chlor-, chloro-, The distribution of the chloragogic cells is indicated by the dotting on the terminal section of the nephridium. Beddard , Trans. Zoöl. Soc., 1886, XII. 68. chloral (klō'ral), n . [ chlor ( in ) + al ( cohol ) .] A colorle mobile liquid (CCl3.CHO), having an agreeable pungent smell and biting taste, first prepared by Liebig from chlorin and alcohol, afterward by Städeler by the action of chlorin on starch. The hydrate of chloral (CCl3.CH(OH)2), as now prepared, is a white crystalline substance having a pungent odor and an acrid taste. In contact with alkalis it separates into chloroform and formic acid. In medicine it is used as a hypnotic, and in doses of from 15 to 30 grains usually produces calm sleep, which lasts for several hours, and is not followed by unpleasant effects, such as frequently attend the use of morphine. In overdoses it paralyzes the nerve-centers, arresting respiration and the action of the heart, and causes death. When used continuously it may produce very serious effects on the system.