411 REFERENCE · Wiktionary
Bradford system
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Proper noun
1
A traditional means of assessing the fineness of wool, by estimating how many 560-yard (512 m) hanks of single-strand yarn could be made by a good spinner from a pound (0.45 kg) of "top" (cleaned combed wool with the fibres all parallel).