• n. From the Old English "tredel" "tredyl" "tredylle". It is a part of a loom, a foot pedal which is activated and operated by the weaver to raise or lower one or more shafts in a shaft loom.

• http://vocab.getty.edu/aat/300247544 (Silk Heritage Thesaurus)

• wd:Q1231985 (Silk Heritage Thesaurus)

• Burnham, Dorothy. Warp and Weft. A Textile Terminology. Royal Ontario Museum, 1980. Simpson, John; Weiner, Edmund (eds). The Oxford English Dictionary. Oxford : Clarendon Press; Oxford; New York: Oxford University Press, 1989. [www.oed.com] Tortora, Phyllis, y Ingrid Johnson. The Fairchild Books Dictionary of Textiles, 2015

http://data.silknow.org/vocabulary/648