The term 'JOULE DIVISION' is a combination of two words, 'JOULE' and 'DIVISION'. JOULE is a unit of energy, named after the English physicist James Prescott JOULE. DIVISION is a mathematical operation that divides one number by another. Therefore, the term 'JOULE DIVISION' refers to the DIVISION of energy, or the process of dividing energy into smaller parts. The crossword solution for this term is 'ERG', which is a unit of energy equal to one millionth of a JOULE.