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.
- astronomize
- astronomy
- astroparticle
- astroparticle physicist
- astroparticle physics
- Astropecten
- astrophil
- astrophile
- astrophobia
- astrophotograph
- astrophotographer
- astrophotographic
- astrophotographical
- astrophotography
- astrophotometer
- astrophotometrical
- astrophyllite
- astrophysical
- astrophysically
- astrophysicist
- astrophysics
- astroplankton
- astropyle
- astroscope
- astroscopy