Usually means: Barbiturate used for sedation, sleep.
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We found 22 dictionaries that define the word seconal:

General (17 matching dictionaries)
  1. Seconal: Merriam-Webster
  2. Seconal: Oxford Learner's Dictionaries
  3. Seconal: American Heritage Dictionary of the English Language
  4. seconal: Collins English Dictionary
  5. seconal: Dictionary.com
  6. Seconal: Online Etymology Dictionary
  7. Seconal: Wikipedia, the Free Encyclopedia
  8. Seconal: Rhymezone
  9. seconal: FreeDictionary.org
  10. seconal: Mnemonic Dictionary
  11. Seconal: TheFreeDictionary.com
  12. Seconal: Dictionary.com
  13. Seconal: Vocabulary.com
  14. Seconal: Wordnik
  15. Seconal: Wiktionary
  16. Seconal: Webster's New World College Dictionary, 4th Ed.
  17. Seconal: Infoplease Dictionary

Computing (1 matching dictionary)
  1. Seconal: Encyclopedia

Medicine (4 matching dictionaries)
  1. Seconal: Merriam-Webster Medical Dictionary
  2. Dorland's Illustrated Medical Dictionary (No longer online)
  3. Probert Encyclopaedia of Medicine (No longer online)
  4. Seconal: Medical dictionary

(Note: See seconals as well.)

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Definitions from Wiktionary (Seconal)

▸ noun:  (pharmacology) A barbiturate drug used as a sedative and hypnotic, a trade name of secobarbital.

Similar:
secobarbital, Red Devil, secobarbital sodium, thiamylal, secbutabarbital, probarbital, pentobarbital, nealbarbital, phenobarbitone, hexobarbital, more...

Opposite:
stimulant, energizer, upper

Types:
barbiturate, nembutal, phenobarbital, mephobarbital, butabarbital, secobarbital, pentobarbital, more...
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Similar:
secobarbital, Red Devil, secobarbital sodium, thiamylal, secbutabarbital, probarbital, pentobarbital, nealbarbital, phenobarbitone, hexobarbital, more...

Opposite:
stimulant, energizer, upper

Types:
barbiturate, nembutal, phenobarbital, mephobarbital, butabarbital, secobarbital, pentobarbital, more...



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