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official

 [ŏ-fĭ´shal]
authorized by pharmacopeias and recognized formularies.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

of·fi·cial

(ŏ-fi'shăl),
Authoritative; denoting a drug or a chemical or pharmaceutical preparation recognized as standard in the pharmacopeia. Compare: officinal.
[L. officialis, fr. officium, a favor, service, fr. opus, work, + facio, to do]
Farlex Partner Medical Dictionary © Farlex 2012

official

(ə-fĭsh′əl)
adj.
Authorized by or contained in the US Pharmacopoeia or National Formulary. Used of drugs.

of·fi′cial·dom n.
of·fi′cial·ly adv.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

of·fi·cial

(ŏ-fish'ăl)
Authoritative; denoting a drug, a chemical, or a pharmaceutical preparation recognized as standard in the Pharmacopeia.
[L. officialis, fr. officium, a favor, service, fr. opus, work, + facio, to do]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012