electro-, electr-, electri-

1. The recording of changes in electric potential associated with contractions of the uterine muscles.
2. The process of recording and analyzing the electric action potentials that result from uterine muscular contractions.

1. A method of distinguishing proteins and other materials on the basis of their electrophoretic mobility and antigenic specificities or the qualities of having certain actions, as of affecting only certain organisms or tissues, or reacting only with certain substances, as antibodies with certain antigens.
2. Electrophoresis in which an antigen migrates from a well through agar gel containing antiserum, forming cone-shaped (rocket) precipiting bands.

The area under the cone is used to calculate the amount of antigen.

1. A laboratory method of identifying antigens in the blood by creating an artificial antigen antibody reaction.
2. Immunodiffusion in which the antigens are separated according to their migration in an electric field.

Immunodiffusiion is the technique for analyzing antigen (a protein molecule that often protrudes from the surface of a cell which can induce an immune response) and antibody mixtures by watching them as they diffuse toward each other within a support medium (usually a gel).

1. An electric current that moves in an ionized layer above the equator in the earth's upper atmosphere.
2. A narrow belt of intense electric current flowing through the lower ionosphere in the equatorial and polar regions which creates auroras.
3. A stream of electricity moving in the upper atmosphere around the equator and also in polar regions, where it produces auroras.

1. Relating to electrokinetics or having to do with electricity in motion.
2. A reference to one of the four types of electrokinetic effects:

• electro-osmosis
• electrophoresis
• streaming potential
• sedimentation potential

Conditions associated with relative movements between a charged surface and an electrolytic solution.

The surface is ordinarily either a solid particle suspended in the solution or the medium through which the solution flows.

An instrument that converts dynamic physical forces into electric signals.

1. The study of the motion of electric charges.
2. The branch of physics that deals with electric currents or electricity in motion.
3. A branch of physics dealing with the steady motion of charges and the behavior of charged particles in electric and magnetic fields.

1. A device designed to measure the speed of ocean currents, based on their electrical effects in the earth's magnetic field.
2. An instrument used to measure ocean current velocities based on their electrical effects in the magnetic field of the earth.
3. A device for determining the motion of ocean water by measuring its electric potentials as it moves through the earth's magnetic field.

A technique for making a graphic record of the heart's movements produced by the electrokymograph (device that records changes in the density of the body part which is being examined) or the record produced by electrokymography (record of the motion of the borders of bodily organs).

1. An instrument that uses both a photoelectric recording system and a fluoroscope to make a record of the movements of a shadow within the fluoroscopic field: "Electrokymographs were once commonly used to study the movements of the heart."
2. A device that provides a continuous recording of the movements of an internal body organ; such as, the heart, generally by recording the movements or the changes in density of the shadow of the organ as presented on a fluoroscope.
3. An appliance which combines a photoelectric recording system with a fluoroscope in order to make it possible for the continuous recording of the movements of a shadow within the fluoroscopic field or of changes in density in that shadow.

1. A radiographic technique combining a photoelectric recording system with fluoroscopy.

It is used especially with electrocardiography to study heart motions.

2. The photography on x-ray film of the motions of the heart or of other moving structures which can be visualized radiographically.
3. The technique of recording the motions of a bodily organ with an electrokymograph.

The oscilloscopic record (electronic device used to produce visual displays corresponding to electrical signals) of vocal cord activities made by means of electrolaryngography (recording of the activity of the vocal cords).

1. An instrument for making a tracing of the movements of the vocal folds.
2. An instrument for recording the activity of the vocal cords during respiration and phonation or the rapid, periodic opening and closing of the glottis through separation and apposition of the vocal cords that, accompanied by breath under lung pressure, constitutes a source of vocal sounds.

The electrolaryngograph consists of a pair of electrodes, one for application to either side of the neck adjacent to the larynx, a generator, an amplifier, and an oscilloscope.

A recording, using an electrolaryngograph, of the activity of the vocal cords from potentials arising in the laryngeal muscles during phonation (making sounds) and respiration.