A mechanical device is an object or system that performs a specific task using mechanical energy. The crossword solutions for the term mechanical device include PENCIL (6 letters), MECHANISM (9 letters), MACHINE (7 letters), MOTOR (5 letters), VALVE (5 letters), and PUMP (4 letters). A PENCIL is a writing instrument used to draw, write, or mark on a surface. A MECHANISM is a device consisting of interrelated parts with separate functions. A MACHINE is a device consisting of fixed and moving parts that modifies mechanical energy and transmits it in a more useful form. A MOTOR is an electrical device that converts electrical energy into mechanical energy. A VALVE is a device that regulates the flow of a fluid by opening, closing, or partially obstructing various passageways. Lastly, a PUMP is a device that moves fluids, such as liquids or gases, by mechanical action.