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A colorless crystalline alkaloid, C7H8N4O2, derived from tea leaves or made synthetically, used as a bronchodilator primarily to treat asthma and chronic obstructive pulmonary disease.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
theophylline(ˌθɪəˈfɪliːn; -ɪn; θɪˈɒfɪlɪn)
(Pharmacology) a white crystalline slightly water-soluble alkaloid that is an isomer of theobromine: it occurs in plants, such as tea, and is used to treat asthma. Formula: C7H8N4O2. See also xanthine2
[C19: from theo(bromine) + phyllo- + -ine2]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
the•o•phyl•line(ˌθi əˈfɪl in, -ɪn)
a crystalline alkaloid, C7H8N4O2, an isomer of theobromine extracted from tea leaves or produced synthetically, used in medicine chiefly to relieve bronchial spasms.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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|Noun||1.||theophylline - a colorless crystalline alkaloid derived from tea leaves or made synthetically; used in medicine as a bronchial dilator|
bronchodilator - a drug that relaxes and dilates the bronchial passageways and improves the passages of air into the lungs
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