chlorine -
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)
chemical element,
element the most favorable environment for a plant or animal; "water is the element of fishes"
gas the state of matter distinguished from the solid and liquid states by: relatively low density and viscosity; relatively great expansion and contraction with changes in pressure and temperature; the ability to diffuse readily; and the spontaneous tendency to become distributed uniformly throughout any container
halogen any of five related nonmetallic elements (fluorine or chlorine or bromine or iodine or astatine) that are all monovalent and readily form negative ions
chlorine -
A toxic, green, gaseous chemical element symbol Cl with an atomic number of 17.
Wikipedia
Chlorine is the chemical element with atomic number 17 and symbol Cl. It is a halogen, found in the periodic table in group 17 (formerly VII, VIIa, or VIIb). As the chloride ion, which is part of common salt and other compounds, it is abundant in nature and necessary to most forms of life, including humans.
OmegaWiki Dictionary
Ω
chlorine A very reactive and highly toxic green, gaseous element, belonging to the halogen family of substances with symbol Cl and atomic number 17.
