Definition of pentobarbital in English:


Syllabification: pen·to·bar·bi·tal
Pronunciation: /ˌpentəˈbärbiˌtäl, -ˌtôl


  • A narcotic and sedative barbiturate drug formerly used to relieve insomnia.
    • Alternative name: 5-ethyl-5-(1-methylbutyl)-barbituric acid; often used as the sodium salt ( sodium pentobarbitone, Nembutal)
    More example sentences
    • In this experiment, human volunteers consistently underestimated their performance impairment after acute administrations of triazolam, but not pentobarbital, a barbiturate.
    • One drug in particular, sodium pentobarbital - a barbiturate used to euthanize animals - is of prime concern.
    • To induce a coma, an anesthesiologist typically infuses a patient with increasing doses of the barbiturate pentobarbital while monitoring her brain waves with electrodes.


1930s: from pentane + barbital (or barbitone).

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