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werturn

ˈwerturn
  [var. of wartern, dial. f. quartern n.2 3 c (quot. 1883).]
  A particular weight of wool (see quots.).

1853 Ibberson Woollen Manuf. Guide 13 Threads of slubbing, varying from 4 to 12 skeins per werturn. Ibid. 89, 1,520 yards are a standard skein. Six pounds, or 1,536 drams, are a standard werturn.

Oxford English Dictionary

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