Sentence:  The two types of silk of greatest interest to the hand weaver are known as Organzine and <WSD>Tram</WSD>. Organzine is a warp silk and is made from two or more single threads twisted together in the opposite direction from the original twist. <WSD>Tram</WSD> is a weft silk and it is made from two or more singles lightly twisted together. 
Meaning of the word marked with <WSD> tags:  A silk thread formed of two or more threads twisted together, used especially for the weft, or cross threads, of the best quality of velvets and silk goods.