from The Century Dictionary.
- noun A spherical or egg-shaped piece of wood, ivory, glass, or other hard substance, over which an article to be darned is drawn smooth.
Sorry, no etymologies found.
A darning-ball, a gourd, or a firm piece of cardboard should be placed under the hole.
_Use of a darning-ball or gourd as a substitute for a ball.
"If we needed it, we've received it," Abby ejaculated, as she pushed her darning-ball into the foot of a stocking.