theophylline

Definitions of theophylline
  1. noun
    a colorless crystalline alkaloid derived from tea leaves or made synthetically; used in medicine as a bronchial dilator
    synonyms: Elixophyllin, Slo-Bid, Theobid
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    type of:
    bronchodilator
    a drug that relaxes and dilates the bronchial passageways and improves the passages of air into the lungs
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