From The Collaborative International Dictionary of English v.0.48 [gcide]:
Chlorine \Chlo"rine\, n. [Gr. ? pale green, greenish yellow. So
named from its color. See {Yellow}.] (Chem.)
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.
[1913 Webster]
{Chlorine family}, the elements fluorine, chlorine, bromine,
and iodine, called the {halogens}, and classed together
from their common peculiarities.
[1913 Webster]
From WordNet (r) 3.0 (2006) [wn]:
chlorine
n 1: 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) [syn:
{chlorine}, {Cl}, {atomic number 17}]
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