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.
- fluorometric
- fluorometrically
- fluorometry
- fluorophor
- fluorophore
- fluorophotometer
- fluorophotometric
- fluorophotometry
- fluoropolymer
- fluoroquinolone
- fluoroscope
- fluoroscopic
- fluoroscopy
- fluorosed
- fluorosilicate
- fluorosis
- fluorotic
- fluorotype
- fluorouracil
- fluorous
- fluorous acid
- fluorphor
- fluorphotometer
- fluorspar
- fluosilicate