Erg vs. Reg — What's the Difference?

The erg is a unit of energy equal to 10−7 joules (100 nJ). It originated in the centimetre–gram–second (CGS) system of units.

A regulation.

The centimeter-gram-second unit of energy or work equal to the work done by a force of one dyne acting over a distance of one centimeter.

An extensive, hard desert surface consisting of wind-polished gravel lying on alluvial soil and cemented together by mineralized solutions.

An extensive area of desert covered with shifting sand dunes.

(internet slang) A regular.

The unit of work or energy, being the amount of work done by a force of one dyne applied through a distance of one centimeter. Equal to 10⁻⁷ joules.

(informal) A regulation.

(geomorphology) A large desert region of sand dunes with little or no vegetation, especially in the Sahara.

Registrar

An ergometer.

Registration

To use an ergometer.

Registry

The unit of work or energy in the C. G. S. system, being the amount of work done by a dyne working through a distance of one centimeter; the amount of energy expended in moving a body one centimeter against a force of one dyne (981 dynes exert the same force as a one gram mass in the earth's gravitational field). One foot pound is equal to 13,560,000 ergs. The absolute Joule is equivalent to 107 ergs, which are equivalent to 0.2389 gram-calories at 15° C. See also mechanical equivalent of heat under equivalent.

(geography) A hard surface of rock fragments set in a sandy matrix, found in some hot deserts; regolith, stony desert.

A cgs unit of work or energy; the work done by a force of one dyne acting over a distance of one centimeter