Ever had the hiccups? Then you're familiar with your diaphragm, the large muscle that stretches across your midriff to support your lungs and help you breathe. When you get the hiccups, your diaphragm spasms uncontrollably.
The Greek word diáphragma referred to the body's midriff and came from the root phrágma, meaning "fence." This led to the Middle English diafragma, also referring to the muscular stretch below the lungs. The idea of a diaphragm as a contraceptive first surfaced in 1933. A diaphragm is also the part of the camera called a "stop," which adjusts the amount of light, and it is a thin, vibrating disc used in electronics to transfer sound.