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[ih-fed-rin, ef-i-dreen, -drin] /ɪˈfɛd rɪn, ˈɛf ɪˌdrin, -drɪn/
noun, Pharmacology.
a white, crystalline alkaloid, C 10 H 15 N, obtained from a species of Ephedra or synthesized: used in medicine chiefly for the treatment of asthma, hay fever, and colds.
Origin of ephedrine
1885-90; < New Latin Ephedr(a) ephedra + -ine2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for ephedrine
Historical Examples
  • Combination of ephedrine and homatropine hydrochlorates (100:1).

    Merck's 1899 Manual Merck & Co.
British Dictionary definitions for ephedrine


/ɪˈfɛdrɪn; ˈɛfɪˌdriːn; -drɪn/
a white crystalline alkaloid obtained from plants of the genus Ephedra: used for the treatment of asthma and hay fever; l-phenyl-2-methylaminopropanol. Formula: C6H5CH(OH)CH(NHCH3)CH3
Word Origin
C19: from New Latin ephedra + -ine²
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for ephedrine

1889, named 1887 by Japanese organic chemist Nagai Nagayoshi (1844-1929), from the plant ephedra, from which it was first extracted, + chemical suffix -ine (2).

Online Etymology Dictionary, © 2010 Douglas Harper
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ephedrine in Medicine

ephedrine e·phed·rine (ĭ-fěd'rĭn, ěf'ĭ-drēn')
An odorless crystalline or powdered alkaloid isolated from shrubs of the genus Ephedra or made synthetically and used in the treatment of allergies and asthma.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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ephedrine in Science
  (ĭ-fěd'rĭn, ěf'ĭ-drēn')   
A white, odorless, powdered or crystalline alkaloid isolated from shrubs of the genus Ephedra or made synthetically. It is used in the treatment of allergies and asthma. Chemical formula: C10H15NO.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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