uni-, un-

(Latin: one, single; a word element for number 1)

disunion (s) (noun), disunions (pl)
The state of separation or lacking agreement.
disunionism (s) (noun), disunionisms (pl)
The breaking of a federation or organized single government: "The national leader rejected the disunionism proposed by the rebellious states."
disunionist (s) (noun), disunionists (pl)
In U.S. History, a secessionist during the period of the U.S. Civil War.
disunite (verb), disunites; disunited; disuniting
1. To create or to be a source of disagreement between different people or factions within a group.
2. To divide something into smaller parts or groups, or to become divided in this way.
disunited (adjective), more disunited, most disunited
1. Created or having been a source of disagreement between different people or factions within a group.
2. Separated or having been separated; set at variance; alienated.
3. Something that has been divided into smaller parts or groups, or which became divided in this way.
disuniter (s) (noun), disuniters (pl)
Someone who, or that which, disjoins or causes alienations.
disunity (s) (noun), disunities (pl)
A lack of accord or agreements within a group; especially, one caused by a disagreement or a difference of opinion.
E pluribus unum. (Latin proverb)
Translations: "One out of many." "Out of many (is) One." "From many, (comes) One."

Used as the motto of the United States, indicating that a single nation was made by uniting many states.

electric unit (s) (noun), electric units (pl)
A unit for measuring the strength of an electric current.

Three different systems of electric units are used:

  • The electromagnetic unit.
  • The electrostatic unit.
  • The ordinary or practical units.

The commonly used practical units are the ampere or unit of current, the volt or unit of electromotive force, the ohm or unit of resistance, the coulomb or unit of quantity, the farad or unit of capacitance, and the watt or unit of power.

electromagnetic system of units, electromagnetic units, emu (noun) (plural used as a singular)
1. A system of electrical units, based on the centimeter, gram, and second, in which a unit of magnetic pole is by definition such that two units of the same sign placed one centimeter apart in free space will repel each other with a force of one dyne.

Units in the system are usually presented with the prefix ab-; such as, abampere, abvolt, etc.

2. A centimeter-gram-second system of electric and magnetic units in which the unit of current is defined as the current which, if maintained in two straight parallel wires having infinite length and being one centimeter apart in vacuum, would produce between these conductors a force of two dynes (units of force) per centimeter of length.

Other units are derived from this definition by assigning unit coefficients in equations relating electric and magnetic quantities.

electromagnetic unit, EMU (noun) (s)
1. A unit based primarily on the magnetic effect of an electric current.
2. Any unit in the centimeter-gram-second system of units for measuring electricity and magnetism that gives a value of one to the magnetic constant; for example, the abampere, abfarad, abhenry, or the abvolt.
electron unit (s) (noun), electron units (pl)
A unit of charge, negative or positive, which is equal to the charge on an electron.
electronic control unit, ECU
1. A term for any embedded system that controls one or more of the electrical systems or subsystems in a motor vehicle.
2. A microprocessor and memory with electronic maps, forming the central part of an engine management system or of subsystems; such as, a fuel injection or ignition system.
electronic flash unit
A small xenon-filled tube with metal electrodes fused into ends.

The gas flashes brilliantly when a capacitor is discharged through the tube.

electrostatic unit
1. Any electrical unit of measure based on the attraction or repulsion of a static charge, as distinguished from an electromagnetic unit, which is defined in terms of the attraction or repulsion of magnetic poles.
2. A unit based primarily upon the force exerted between two electric charges.
3. An electric unit based primarily on the dynamic interaction of electric charges.

It is defined as a charge which, if concentrated on a small sphere, would repel with a force of one dyne which is a similar charge of one centimeter away in a vacuum.