Improve کلیدی پتھر meaning in English

Is there any meaning of the word کلیدی پتھر that needs an edit? Please click that meaning to rewrite it.

keystonekeystonesquoin

Is there any meaning of the word کلیدی پتھر that needs to be removed from the list? Please click that meaning to mark it for deletion.

keystonekeystonesquoin

Do you want to add a new meaning, definition, and a sentence of the word کلیدی پتھر? Please feel free to add.