An arrangement of machines and workers in a factory: "Mike works on an assembly line which has a moving track or belt, which allows a number of specialized operations that are performed in the productions of cars."

A prominent green or red line which can be seen in the spectra of auroras which corresponds to certain forbidden transitions of the neutral oxygen atom.

1. An instrument which postpones an electric signal's arrival time in a circuit by employing capacitive (a system that enables it to store an electric charge) and inductive properties (production of an electromotive forces).
2. A delay line that uses properties of lumped or distributed capacitive and inductive elements.

It can be used for signal storage by recirculating information-carrying wave patterns.

1. An imaginary line in which each segment of the line is parallel to the direction of the electric field or the direction of the electric displacement at that point, and the density of the collection of the line is relative to the electric field or the electrical displacement.
2. The electric lines of force that make up an electric field or region.
3. The integral over a surface of the component of the electric displacement perpendicular to the surface and equal to the number of electric lines of forces crossing the surface.

A data network which uses a building's electrical system as the transmission system and regular wall outlets as connecting points.

Powerline networks do not interfere with the delivery of electricity in the same circuit because the data are transmitted at a much higher frequency than the 60Hz or 50Hz used for AC (alternating current) power.

1. A delay line the operation of which is based on the time of propagation of electromagnetic waves through distributed or lumped (concentrated) capacitance and inductance.
2. A delay line consisting simply of a transmission line carrying pulse trains.

The delay time generally available is not sufficient for storing a large number of pulses within a reasonable line length.

1. In a television system, a method by which a spot of light or another energy source moves along a given path by electronic means.
2. In facsimile copying, a method by which a spot on a cathode-ray tube moves across the copy by electronic actions.
3. A method that provides motion of the scanning spot along the scanning line controlled by electronic procedures.
4. Facsimile scanning in which a spot on a cathode-ray tube moves across the copy electronically while the record sheet or subject copy is moved mechanically in a perpendicular direction.

The line of shortest distance between any two points on a mathematically defined surface: Specifically, a geodesic line is a line on the surface of the Earth, a line of double curvature which usually lies between the two normal section lines determined by the two points.

A line delineated by government survey for the purpose of defining the bends or windings of the banks of a stream or the shore of a body of water, and as a means for determining the quantity of land embraced by the survey.

A tool which consists of a small, heavy object attached to a string or rope and that is used especially to see if something; such as, a wall, is perfectly vertical: "All of the carpenters were using plumb lines to make sure the sides of the newly constructed houses were straight and not leaning."

An electric main that provides large amounts of power at a high voltage to remote locations.

Internet sources: on-line quotes.

1. The path of a nautical vessel or air craft that maintains a constant or fixed compass direction.
2. A line that cuts all meridians (imaginary great circle on the earth's surface, passing through the geographic poles) at the same angle.
3. Etymology: possibly from Spanish or Portuguese rumbo, "course, direction"; ultimately from Latin rhombus, "turn, spin"; which came from Greek rhombos, "spinning top", from rhembesthai, "to spin, to whirl".

In electromagnetism, a coaxial cable in which the central conductor and the outer conductor are formed by joining rigid pieces of copper.

A heavy wire carrying large amounts of electricity over long distances from a generating station to a place where the electricity is used.