locking stone
noun
1 Clockmaking and Watchmaking a locking pallet in the form of a ruby or other jewel.
2= keystone.
Origin
Mid 19th century.
- historist
- historization
- historize
- historizing
- history
- historyless
- history-maker
- history-making
- history pageant
- history play
- history sheet
- history-sheeter
- history taking
- historywise
- histosol
- histotoxic
- histotrophic
- histotropic
- histozyme
- histrio
- histrion
- histrionic
- histrionically
- histrionicism
- histrionise