Synonym for barbital ... <chemical> A long-acting barbiturate that depresses most metabolic processes at high doses. It is used as a hypnotic and sedative and may induce dependence. Barbital is also used in veterinary practice for central nervous system depression. ... Pharmacological action: gaba modulators, sedatives, barbiturate. ... Chemi... Found on http://www.encyclo.co.uk/local/20973