Pronunciation: (bob'in), [key]
1. a reel, cylinder, or spool upon which yarn or thread is wound, as used in spinning, machine sewing, lacemaking, etc.
a. a spoollike form around which a coil of insulated wire is wound to provide an inductance.
b. the coil itself.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.