energy unit, heat unit, work unit - a unit of measurement for work

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

Latin alphabet, Roman alphabet - the alphabet evolved by the ancient Romans which serves for writing most of the languages of western Europe

alphabetic character, letter of the alphabet, letter - the conventional characters of the alphabet used to represent speech; "his grandmother taught him his letters"