zhù​dǐng​shí

plinth stone

柱顶石 柱頂石 zhù​dǐng​shí
plinth stone
A stone block placed at the base of a pillar to prevent wood rot or stabilize the column
cornerstone
(metaphorical) A foundational or essential supporting force; a pillar of support
coping stone
A stone block placed at the top of a column or wall to provide protection or decoration

Cross-References

Same as