Etymology
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Seconal

1935, U.S. proprietary name (Eli Lilly & Co.), from Secon(dary) Al(lyl)or else from secobarbital (itself short for secondary barbital).

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Definitions of Seconal

Seconal (n.)
barbiturate that is a white odorless slightly bitter powder (trade name Seconal) used as a sodium salt for sedation and to treat convulsions;
Synonyms: secobarbital sodium / secobarbital / red devil
From wordnet.princeton.edu