A contorted knot in wood.
A crossgrained protuberance; a nodule; a boss or projection.
A lined or crossgrained pattern of ridges or indentations rolled or pressed into a part for grip.
To roll or press a pattern of ridges or indentations into a part for grip.
A small thickened portion or knot found on linen yarn, caused by defects.
Fabric fiber produced by slubbing.
To draw and twist fibers in order to prepare them for spinning.