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.
- subterminal
- subternatural
- subterposed
- sub-terra
- subterraneal
- subterranean
- subterranean clover
- subterranean geography
- subterraneanly
- subterraneity
- subterraneous
- subterraneous geometry
- subterraneously
- subterrean
- subterrene
- subterrenean
- subtersensuous
- subtertian
- subtest
- subtext
- subtextual
- subthalamic
- subthalamic nucleus
- subthalamus
- subtherapeutic