(chemistry, inorganic chemistry) Common table salt, a compound composed of equal number of sodium and chlorine atoms. Chemical formula NaCl.

A colourless narcotic liquid, trichloroacetaldehyde, CCl₃CHO, obtained at first by the action of chlorine on alcohol and that, when treated with water, produces chloral hydrate.

(transitive, chemistry) To add chlorine to (something, especially water, to purify it; or an auriferous substance, to extract gold from it).

(mineralogy) A dark green mineral resembling serpentine, being a mixed silicate of magnesium, iron and aluminium. / (chemistry, countable) Any salt of chlorous acid.

(organic chemistry) A halogenated hydrocarbon, trichloromethane, CHCl₃; it is a volatile, sweet-smelling liquid, used extensively as a solvent and formerly as an anesthetic.

To treat with chloroform, or to render unconscious with chloroform.

(chemistry) chlorous acid

(inorganic chemistry) An inorganic compound with the formula HCl. Forms hydrochloric acid when dissolved in water.

(inorganic chemistry) AlCl, only exists in the gas phase when AlCl₃ is heated with aluminium.

(organic chemistry) Any organic compound containing an acyl functional group (R-CO-) directly attached to a chlorine atom (R-CO-Cl).