n. [ Chlorine + alcohol. ] 1. (Chem.) A colorless oily liquid, CCl3.CHO, of a pungent odor and harsh taste, obtained by the action of chlorine upon ordinary or ethyl alcohol. [ 1913 Webster ]

2. (Med.) Chloral hydrate. [ 1913 Webster ]

n. [ Chloral + amide. ] (Chem.) A compound of chloral and formic amide used to produce sleep. [ 1913 Webster ]

n. 1. a chemical substance (CCl3.CH(OH)2) which is a hydrate of trichloroacetaldehyde. It crystallizes as white monoclinic plates, obtained by treating chloral with water. It produces sleep when taken internally or hypodermically, and is used in medicine as a hypnotic and sedative; -- called also chloral It may be habit-forming, and is a controlled substance listed in the U. S. Code of Federal Regulations. It is sometimes used to render a person unconscious for illegal or nefarious purposes, and in this use, a concentrated solution is one of the agents called knockout drops. [ PJC ]

n. (Med.) A morbid condition of the system resulting from excessive use of chloral. [ 1913 Webster ]

n. [ Chlorine + aluminium. ] An impure aqueous solution of chloride of aluminium, used as an antiseptic and disinfectant. [ 1913 Webster ]

n. [ Pref. meta- + chloral. ] (Chem.) A white, amorphous, insoluble substance regarded as a polymeric variety of chloral. [ 1913 Webster ]