The term 'ERG' is an abbreviation for the ENERGY unit of work or ENERGY, also known as the erg. It is a unit of ENERGY equal to the work done by a force of one dyne acting over a distance of one centimeter. The term is derived from the Greek word ergon, meaning 'work'. The two crossword solutions for this term are 'ENERGY' (6 letters) and 'ENERGYUNIT' (10 letters). Both of these terms refer to the same unit of ENERGY, the erg.