Also included in Spies, Pop Flies, and French Fries is a special feature called Operation Explore More, which encourages readers to undertake their own intelligence-gathering operations, using resources the author has compiled at the end of each chapter.
Medical Definition of COUGH. : to expel air from the lungs suddenly with an explosive noise usually in a series of efforts. transitive verb. Dictionary: Definition of cough.
A productive cough is a cough that results in mucus, phlegm or blood being expelled from the lungs or upper airway. In many cases, a productive cough develops during a common ailment such as flu, cold, sinus or respiratory infection.