The chainsaw is a highly effective and efficient tree and branch cutting power tool. It works with an engine, referred to as a power head; powering a metal chain, driven by a centrifugal clutch, with a chain moving around a groove in the guide bar at fast speeds.
adenoids. 1  one of two masses of lymphatic tissue situated on the posterior wall of the nasopharynx behind the posterior nares. During childhood these masses often swell and block the passage of air from the nasal cavity into the pharynx, preventing the child from breathing through the nose.
An adenoidectomy is the surgical removal of the adenoids. The adenoids are glands located in the throat behind the nose. They are not visible through the mouth. The adenoids fight infection, but they can become infected and enlarged themselves.n adenoidectomy is the surgical removal of the adenoids. The adenoids are glands located in the throat behind the nose. They are not visible through the mouth. The adenoids fight infection, but they can become infected and enlarged themselves.