Related Clues:

• Work or energy unit
• Sandy desert area
• Workout unit
• Physics 12-Down
• Bit of energy?
• Piece of work?
•     Work unit
• Metric work unit
• Ten-millionth of a joule
• Work unit, in physics
• Joule piece
• Rowing machine unit
• 0.1 microjoule
• A bit of a joule
• Tiny fraction of a British thermal unit