A.B.C.D.E.F.G.H.I.J.K.L.M.N.O.P.Q.R.S.T.U.V.W-Z

WALL TILE: A glazed tile with a body that is suitable for interior use and which is usually non-vitreous, and is not required nor expected to withstand excessive impact or be subjected to freezing and thawing conditions.
WATERPROOFING MEMBRANE: A covering applied to a substrate before tiling to protect the substrate and framing from damage by water. May be applied below mortar beds or directly beneath thin-set tiles.
WARPING -- a distortion of a piece of flooring from its true plane that may occur in seasoning.
WARP -- The threads of yarn running lengthwise in a woven fabric.
WASHBOARDING -- (See CORN ROWING.)
Wash --A sloping horizontal surface formed to cause water to run off.
WATER MARKS -- (See SHADING.)
WEAR - The diminishing of the face yarn as the result of external abrasion.
WEAVING --The process of interlacing or weaving surface and backing yarns together, in one operation, Several types of looms are employed (See AXMINSTER, WILTON, VELVET).
Weep-Hole --An opening at the bottom of a unit to allow any moisture behind it to escape.
WEFT or WOOF --The threads running across a woven fabric from side edge to side edge, binding in the pile and weaving in the warp threads.
WEIGHT DENSITY -- This is the value obtained by multiplying W by D. 
Weld Plate --A square metal device cast flush to the surface of poured material for attachment by means of welding.
WET AREAS: Tile surfaces that are either soaked, saturated or subjected to moisture or liquids (usually water) such as gang showers, tub enclosures, showers, laundries, saunas, steam rooms, swimming pools and exterior areas.
Wet Cast -- The process of pouring wet concrete into a mould to achieve a precast product of desired shape. This is pure concrete not to be compared with cast stone. 
White Marble - an opaque stone with a little metallic shimmer to it (like aventurine). This stone has some depth to it, which is unusual for an opaque stone.
White Onyx - a semi-translucent white to slightly yellowish-white stone. Sometimes with more opaque white banding.
White Quartz - a translucent white stone. White Quartz is usually fairly uniform in color, but has varying degrees of opacity - areas of more or less cloudiness
WIDTH -- Distance between the two side edges of a fabric.
WIDTHWISE BANDS -- Widthwise conditions broader than one or two rows or stitches, extending partially or fully across the width of the carpet.
WIDTHWISE CONDITIONS -- Irregularities which run perpendicular to the side edge of the carpet (in a widthwise direction).
WIDTHWISE LINES -- Narrow lines extending partially or fully across the width of the carpet
WIDTHWISE OILY LINES -- Dark lines usually apparent with usage.
WILTON --A fabric woven on a loom controlled by a Jacquard pattern device which raises one of from 2 to 6 surface yarns over a bladed pile wire that is then withdrawn to cut the tufts and give a plush like face. The other yarns run "dormant" through the center and back of the fabric in the warp direction.
WIRE -- Metal strips inserted in the weaving shed in the Jacquard and velvet weaves so that the surface yarns are bound down over them forming a loop of the proper height. Round wires are used in loop pile fabrics and the loops are left uncut as the wire is withdrawn. Flat wires with knife edges are used in Wilton, velvet, and saxony weaves and the loops are cut as the wire is withdrawn, producing a fabric with a plush like surface.
wire brushing -- a method for imparting an artificial texture or distressed appearance to the surface of hardwood flooring.
WIRE MARKS -- Widthwise lines in woven carpet produced by defective wires, frequently a repetitive pattern.
WOOLEN YARN -- A rather soft, bulky yarn spun from both long and short wool fibers not combed out straight but lying in all directions so that they interlock and produce a felt-like texture.
WORSTED YARN -- Worsted yarn is spun from longer types of staple, carded to lay the fibers as nearly parallel as possible, and then combed to extract the shorter fibers as "noil."
WOVEN BACKING --Backing produced by weaving, utilizing natural or man-made fiber.
YARN --A generic term for a continuous strand of textile fiber, filaments or material suitable for knotting, weaving, tufting, or otherwise intertwining to form a textile fabric.
YARN DYEING -- Yarn dyed before carpet is manufactured. (See SKEIN DYEING and PACKAGE DYEING
YARN PLY -- The number of strands of single yarns twisted together to form one carpet yarn