A bar with teeth on its face or edge, to work with those of a gearwheel, pinion, or worm, which is to drive or be driven by it.
A bar with teeth on its face or edge, to work with a pawl as a ratchet allowing movement in one direction only, used for example in a handbrake or crossbow.
A device, incorporating a ratchet, used to torture victims by stretching them beyond their natural limits.
“A rough racker or pacer will prove almost as wearisome as the jog-trotter.”
“Egypt'as Nabil Al Mamoon and Cyryl Sen of Malaysia conducted the sessions, in the presence of racker controllers Motahar Zabarah of Yemen's and Egypt's Mohamed Bassiouny.”
“The new Buckmarks have an improved grasping area, and there is now help for the older ones from Striplin Custom Guns called the Slide Racker.”