slub

/slสŒb/

IPA: /S L AH1 B/

noun
  1. 1

    A small thickened portion or knot found on linen yarn, caused by defects.

  2. 2

    Fabric fiber produced by slubbing.

verb
  1. 1

    To draw and twist fibers in order to prepare them for spinning.

Source: https://en.wiktionary.org/wiki/slub