from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A highly irritating, greenish-yellow gaseous halogen, capable of combining with nearly all other elements, produced principally by electrolysis of sodium chloride and used widely to purify water, as a disinfectant and bleaching agent, and in the manufacture of many important compounds including chloroform and carbon tetrachloride. Atomic number 17; atomic weight 35.453; freezing point -100.98°C; boiling point -34.6°C; specific gravity 1.56 (-33.6°C); valence 1, 3, 5, 7. See Table at element.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A toxic, green, gaseous chemical element (symbol Cl) with an atomic number of 17.
from the GNU version of the Collaborative International Dictionary of English
- n. One of the elementary substances, commonly isolated as a greenish yellow gas, two and one half times as heavy as air, of an intensely disagreeable suffocating odor, and exceedingly poisonous. It is abundant in nature, the most important compound being common salt (Sodium chloride). It is powerful oxidizing, bleaching, and disinfecting agent. Symbol Cl. Atomic weight, 35.4.
from The Century Dictionary and Cyclopedia
- n. See chlorin.
- Of the color of young leaves; light green.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a common nonmetallic element belonging to the halogens; best known as a heavy yellow irritating toxic gas; used to purify water and as a bleaching agent and disinfectant; occurs naturally only as a salt (as in sea water)
Coined by Sir Humphry Davy from Ancient Greek χλωρός (khlōros, "pale green") (Wiktionary)