DuckCorp Dico

Found one definition

1.                 From The Collaborative International Dictionary of English v.0.48:
                   
   
   
                   
                     
   Ergon \Er"gon\, n. [NL., fr. Gr. ? work.] (Physics)
      (a) Work, measured in terms of the quantity of heat to which
          it is equivalent.
      (b) same as Erg.
          [Webster 1913 Suppl.]