SLUB

n. fiber produced by the slubbing process; irregularity in yarn, knot or bump in yarn

The Saxon State Library (Sächsische Landesbibliothek) in Dresden is the Staatsbibliothek of Saxony and the academic library of the Technische Universität Dresden. It is one of the main  public archival centers of Germany. Its treasures, collected over four centuries, were located in the Japanese Palais and in temporary archives for longtime. Since 2002 it is located in a new building merged to the Sächsische Landesbibliothek - Staats- und Universitätsbibliothek Dresden (Saxon State Library - Regional and University Library Dresden).
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Noun
1. soft lump or unevenness in a yarn; either an imperfection or created by design
(synonym) knot, burl
(hypernym) roughness

(v. t.)
To draw out and twist slightly; -- said of slivers of wool.
  

(n.)
A roll of wool slightly twisted; a rove; -- called also slubbing.
  

slub /slʌb/
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