Trundlehead
Pronunciation : Trun"dle*head`
Part of Speech : n.
Definition : 1. (Gearing)
Defn: One of the disks forming the ends of a lantern wheel or pinion.
2. The drumhead of a capstan; especially, the drumhead of the lower of two capstans on the sane axis.
Source : Webster's Unabridged Dictionary, 1913