The word erg can mean:-

• An erg is the unit of energy in the centimetre-gram-second (CGS) system of units.
• An erg (landform) is a large flat area of desert covered with shifting wind-swept sand, especially in the Sahara.
• An erg (as short for ergometer) is an indoor rower, taken from its purpose of measuring the amount of work done during.
• The ergs were fictional "force field creatures" in Dan Simmons' Hyperion Cantos, used to drive Treeships through space.

ERG may mean:-

• Electroretinography
• ERG theory, a psychological theory stated by Clayton Alderfer
• ERGS for Electronic Route Guidance System
• ERG is the approved GeneSymbol for the 'v-ets erythroblastosis virus E26 oncogene like' gene, frequently involved as a part of fusion genes.

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