1) Device 2) Furnace device 3) Shield in Star Trek 
• (n.) That which deflects, as a diaphragm in a furnace, or a cone in a lamp (to deflect and mingle air and gases and help combustion).
device which is normally smaller than the wavelength of the microwaves and changes the microwave relationship in its vicinity by diffraction and/or resonance
De·flect'or noun (Mech.) That which deflects, as a diaphragm in a furnace, or a cone in a lamp (to deflect and mingle air and gases and help combustion). 
A stationary or moveable angled arm which deflects product flow access across a belt or roller conveyor to the desired location.
[n] - a device intended to turn aside the flow of something (water or air or smoke etc)
deflect, deflects, deflectable, deflective, deflector 1. To change course because of hitting something, or change something's course by coming into contact with it. 2. To turn aside or cause to turn aside; to bend or to deviate. 3. To direct people's attention or criticism away from a subject or issue to something else. 4. To force someone to ch...
noun a device intended to turn aside the flow of something (water or air or smoke etc)