n :  a bitter crystalline antipyretic alkaloid C₂₀H₂₆N₂O₂ found with quinine in cinchona bark and usu. present in commercial quinine .
 
 also  esp Brit    
 
Similar sounding terms:  hy·dro·qui·none 
 
Published under license with Merriam-Webster, Incorporated.  © 1997-2024.