| barbiturate | A widely used group of sedative drugs made from barbituric acid. Continual use may result in addiction. Examples include Phenobarbital, secobarbital, pentobarbital, butalbital and amobarbital. (27 Sep 1997) |
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| barbiturates | A class of chemicals derived from barbituric acid or thiobarbituric acid. Many of these are medically important as sedatives and hypnotics (sedatives, barbiturate), as anaesthetics, or as anticonvulsants. (12 Dec 1998) |
| sedatives, barbiturate | Those derivatives of barbituric or thiobarbituric acid that are used as hypnotics or sedatives. The structural class of all such derivatives, regardless of use, is barbiturates. (12 Dec 1998) |
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