Webster's English Dictionary

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spool

spool \'spu:l\ n [ME spole, fr. MF or MD; MF espole, fr. MD spoele; akin to 
   OH]G spuola spool 1a: a cylindrical device which has a rim or ridge at each 
   end and an axial  hole for a pin or spindle and on which thread, wire, or 
   tape is wound 1b: something like a spool  2: material or the amount of 
   material wound on a spool  - spool vb