| electron |
a negatively charged particle, considered a fundamental unit of matter, that exists independently or outside the nucleus of an atom. |
| electronegative |
having a negative electric charge. [2 definitions] |
| electron gun |
the electron-emitting cathode in a cathode ray tube together with the electromagnetic apparatus that collects and focuses the electron stream. |
| electronic |
of or relating to devices, circuits, or systems based on electronics. [2 definitions] |
| electronic data processing |
the use of computers to process and store information. |
| electronic mail |
messages typed into a computer terminal and sent via telephone cable to another terminal. |
| electronic music |
music that is produced electronically by an instrument such as a synthesizer. |
| electronic organ |
a musical instrument that resembles a pipe organ in its keyboard and stops, but produces music electronically rather than through pipes. |
| electronics |
(used with a sing. verb) the science that is concerned with the flow of electrons in various physical media, and with their properties and uses. [2 definitions] |
| electron lens |
an electric or magnetic field, or a combination of the two, that is used to focus or deflect an electron beam. |
| electron microscope |
any of various microscopes that use electrons rather than rays of light to magnify the image of the object being viewed. |
| electron tube |
a sealed, tube-shaped container in which a pair of electrodes controls the flow of electrons through a vacuum or very low-pressure gas. |
| electron-volt |
a unit of energy equal to the energy of one electron accelerated by one volt, or equal to 1.602 times 10-12 erg. |
| electrophoresis |
the motion of particles, esp. colloids, in a relatively stationary fluid due to the influence of an electric field, usu. provided by immersed electrodes; cataphoresis. |
| electrophorus |
an apparatus used to create static electricity by induction. |
| electrophysiology |
the electrical properties of living cells and tissues, or the study of these properties. |
| electroplate |
to cover with a thin coat, as of metal, by electrolysis. [2 definitions] |
| electroporation |
in genetics, a method of introducing foreign DNA into a cell by means of an electric pulse that makes the cell membrane more permeable. |
| electropositive |
containing a positive electrical charge. [2 definitions] |
| electroscope |
a device used for detecting small amounts of electric charge, usu. by using metal foil to show attraction or repulsion. |
| electroshock |
a treatment for mentally ill persons in which an electric current is passed through the brain; electroshock therapy. |