What is the count of warp and weft yarn?
Here, count refers to the yarn count (warp yarn count and weft yarn count) and by construction primarily it means the number of warp yarns and weft yarns used in one inch of fabric. The yarn count (number) is defined as the thickness and fineness of the yarns.
What does twill mean in English?
1 : a fabric with a twill weave. 2 : a textile weave in which the filling threads pass over one and under two or more warp threads to give an appearance of diagonal lines.