Source: BURNHAM, Dorothy (1980). Warp and Weft: A Textile Technology, Toronto: Royal Ontario Museum, p. 154.
GVE
A twill is a basic weave based on a unit of three or more individual warp threads (picks) and three or more individual weft threads (ends). In this type of weave, each end passes over two or more adjacent picks and under the next one or more. The binding points move one end on successive picks and form characteristic diagonal lines. There are many forms of twill weave.
Source: BURNHAM, Dorothy (1980). Warp and Weft: A Textile Technology, Toronto: Royal Ontario Museum, p. 154.
GVE