Abbreviation for Watt hour, a unit of energy equivalent to one watt of power expended for one hour of time.
Wh kg-1
Unit of energy density.
What You See Is What You Get
The image you see on the screen matches what will print on paper.
Wheatstone Bridge
Four arm bridge circuit used to measure resistance, inductance or capacitance.
The Mesopotamians are credited with the invention of the wheel.
Wheel Balance
The wheel and tyre of a vehicle needs to be balanced so that as they rotate they do not vibrate. Any wheel and tyre assembly vibration can result in a wobbling of the steering wheel or if severe the whole vehicle.
Wheel Bearing
The main wheel bearing that allows the wheel to rotate, supports the vertical load, fore/aft load and side loads generated during cornering.
Wheel Bump
The motion of the suspension as the strut is compressing.
Wheel Dresser
A tool or device for dressing or truing a grinding wheel.
Wheel Droop
Total downward movement of a wheel from a static ride height.
Wheel Hop
The vertical oscillatory movement of a wheel between the road surface and the sprung mass of the vehicle.
Wheel Nut
Fixings that secure the wheel to the wheel hub.
The distance between the centres of the front and rear wheel axles as viewed from the side of the car.
The liquid which remains after milk is curdled, usually in the process of cheese-making.
Whirling is defined as the rotation of the plane made by the bent shaft and the line of centres of the bearing.
A very thin, single crystal of high perfection which has an extremely large length-to-diameter ratio.
A radiofrequency electromagnetic signal generated by some lightning discharges.
White Body
A hypothetical body whose surface absorbs no electromagnetic radiation of any wavelength.
White Calx of Antimony
Mixture of antimony oxide and potassium oxide.
White Cast Iron
A low-silicon and very brittle cast iron, in which the carbon is in combined form as cementite; a fractured surface appears white.

White Dwarf
A star that is the remnant core of a star that has completed fusion in its core.
White Gold
An alloy of gold and nickel or palladium used in jewellery.

White Lead
Old name for Lead II Carbonate.
White Light
Light that can be resolved into a continuous spectrum.
White Metal
The name given to a range of alloys usually containing antimony alloyed with tin, copper or lead to produce a white silvery metal.
White Noise
The power spectral density of white noise is independent of frequency.
White Room
A clean and dust-free room used for assembly and repair of precision equipment.
White Smoke
The smoke emitted during a cold start from a diesel engine, composed mainly of unburnt fuel and particulate matter.
White Spirit
A petroleum distillate that is often used as a cheap substitute for turpentine.
White Vitriol
Old name for Zinc Sulphate.
Whittle, Frank
Inventor of the turbojet and turbofans.
Whitworth, Joseph Sir
19th century engineer with a world-wide reputation of producing machines of unrivaled quality and precision.
Whole Body Vibration
The vibration experienced by a person whilst operating equipment or vehicle
Whole Numbers
The whole numbers is the set of natural number plus zero, that is 0, 1, 2, 3, 4, 5, . . .