: a barbiturate C12H18N2O3 that is used chiefly in the form of its bitter hygroscopic sodium salt as a hypnotic and sedative

Examples of secobarbital in a Sentence

Recent Examples on the Web
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In their legal quest to avoid a painful death, the prisoners offer up a dark variety of alternatives, including firing squad, sevoflurane gas, diazepam and fentanyl, an oral dose of secobarbital and pentobarbital. — Keri Blakinger, Houston Chronicle, 26 June 2018 Stone mixed applesauce with the powdered secobarbital, a powerful sedative that is fatal in high doses. — Soumya Karlamangla, latimes.com, 30 June 2017 Once the secobarbital had been procured, Kathy seemed to relax. — Kevin Simpson, The Denver Post, 2 Apr. 2017

Word History

Etymology

from Seconal, a trademark + barbital

First Known Use

1951, in the meaning defined above

Time Traveler
The first known use of secobarbital was in 1951

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Cite this Entry

“Secobarbital.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/secobarbital. Accessed 26 Sep. 2026.

Medical Definition

secobarbital

noun
: a barbiturate that is used chiefly in the form of its bitter hygroscopic sodium salt C12H17N2NaO3 as a hypnotic and sedative

called also quinalbarbitone

see seconal

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