uniselector

English

Etymology

From uni- +‎ selector.

Noun

uniselector (plural uniselectors)

1. A type of stepping switch able to select on only one axis, formerly widely used in telephone exchanges.
   • 1952 January, “Traffic Control at Burntisland, Scottish Region”, in Railway Magazine, page 53:

     Relays and uniselectors of types installed in many telephone exchanges are used in the selective ringing dial system.