What is the Threat of Radon? Radon is the second leading cause of lung cancer after smoking. In the United States, the EPA estimates that about 21,000 lung cancer deaths each year are radon related and in Canada that number stands at approximately 3,000.
The definition of intermittent is something that starts and stops or happens irregularly. An example of intermittent is occasional thunder during a rainstorm. stopping and starting at intervals; pausing from time to time; periodic. Origin of intermittent.
intermittent. marked by alternating periods of activity and inactivity. intermittent claudication a group of symptoms characterized by pain, cramping, and weakness in the calf muscles of one or both lower limbs, brought on by walking and relieved by resting for a few minutes.