Ultrasound technicians may expect to perform some of their work in rooms with low lighting. They can expect to be on their feet for a majority of their work time, and must be able to do some lifting or turning of patients who require assistance.
semiconductor diode A diode made of semiconductor components, usually silicon. The cathode, which is negatively charged and has an excess of electrons, is placed adjacent to the anode, which has an inherently positive charge, carrying an excess of holes. At this junction a depletion region forms, with neither holes nor electrons.
The definition of a diode is an electronic device with two transmitting terminals that allows electric current to flow in one direction while blocking current in the opposite direction.An example of a diode is a light-emitting diode, an LED.iode. noun. 1  An electronic device that restricts current flow chiefly to one direction. 2  An electron tube with a cathode and anode. 3  A two-terminal semiconductor device used chiefly as a rectifier.