This glossary was compiled by Don B at jaguarforums.com and is reproduced here
with his permission
Wabco ECAS = Electronically Controlled Air Suspension, basis of Jaguar CATS and ECATS
WAG = Wild-assed guess
Washed Cylinder = Cylinder in which excess fuel has washed away oil causing loss of compression
Washer = Windshield/Windscreen washer
Washer = A ring of steel or other material used with a bolt and nut to distribute pressure, seal, etc.
Washer, D = D-Washer Round washer with a flat-sided center hole that resembles the letter D
Washer, Tab = Flat washer with projecting tab that is bent upward to lock against the nut or bolt head
Water Pump Pliers = Channellock Pliers, slip-joint pliers, tongue-and-groove pliers
Waxoyl = Rustproofing liquid used on many Jaguars to protect against body and chassis corrosion
WB = Wideband or Wide Band, a type of O2 Sensor
WB or W/B = Wheel Base or Wheelbase (see LWB, SWB)
WDS = Ford/JLR Worldwide Diagnostic System, computer-based diagnostics (see IDS, PDU, SDD)
Weather Seal = Weatherstrip, Draught Excluder
Weatherstrip = Weather Seal, Draught Excluder
Weight = Force exerted on a body by gravity, varies with altitude but commonly equated to Mass (w.s)
Weslake, Harry = Cylinder-head and engine tuning specialist who helped refine the Jaguar XK engine
Weslake Research and Development = Firm of cylinder-head specialist Harry Weslake (XK engine)
Wheel Nut = Lug Nut
Whitley = Coventry, U.K. headquarters of Jaguar Land Rover from 2011
Whitworth, British Standard Imperial unit-based thread measurement standard
WHP = Wheel horsepower
Wilton Cloth = Angora goat fleece textile used in classic Jaguar convertible tops & tonneaus (Mohair)
Windscreen = Windshield
Windshield = Windscreen
Wing = Fender
Wiring Harness = Loom, Harness Loom
Woodruff Key = Half-moon shaped tab that aligns and connects a gear or pulley to a drive shaft
Woolcloth = Woolen textile used in Jaguar headliners until c. 1971
Worm-Drive Hose Clamp = Jubilee Clip; hose clamps made by Cheney, Jubilee, Norma, Regent, TEX
WOT = Wide Open Throttle
WOT During Cranking = ECM senses WOT and cancels fuel injection to clear flooded engine
WPR = Weight-to-Power Ratio, pounds-per-horsepower, see PWR
Wrench = Spanner
Wrist Pin = Gudgeon Pin, piston-to-connecting rod pin
w.s. = Which See, see the separate entry in this list
WSS = Wheel Speed Sensor (ABS Sensor)
WTF = “What the F**k”
WV = Water Valve (DCCV, DCFV, CCV, HCV, HWCV, HV)