Yard goods or yardage. Cloth sold by the running yard as distinguished from made-up garments, rugs, blankets, bed spreads, etc.
Yarn. A continuous strand of spun fibres used for weaving or knitting. Distinguished from thread, composed of two or more yarns (ply) united by twisting. Thread is used for sewing, not for weaving.
Yarn-dyed. Fabrics, the yarns of which were dyed before weaving.

Zephyr. 1. Fabrics of light and delicate texture described by this term. See Gingham. 2. Light weight yarn for knitting, crocheting and needlework.
Zephyrized. Knit underwear manufacturers have agreed to use this term to indicate a light weight bleached knit fabric.

Zibeline. Origin, "zibeline" meaning fur or pelt of a sable. Heavy woolen fabric having a long hairy nap laid down on the surface. Stock-or yarn-dyed; fulled, napped, brushed; durable, depending upon quality; hairs tend to wear off the surface.  Uses: coats and suits. Weave twill.