trundlehead
Trun"dle*head`, n. 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.
Trun"dle*head`, n. 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.