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chloral n. 三氯乙荃,三氯乙二醇 三氯乙荃,三氯乙二醇 chloral hydrate \chloral hydrate\ 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} Note: 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] Chloral \Chlo"ral\, 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]
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