A stone laid during the construction of a (usually important) building, the laying of which is usually marked by a ceremony.
The basis of something.
The top stone of an arch.
A retail price that is double the cost price; a markup of 100%.
A native or resident of the American state of Pennsylvania.
Something on which other things depend for support.
The combination of the shortstop and second baseman.
To distort (an image) by projecting it onto a surface at an angle, which for example causes a square to look like a trapezoid.
To double the cost price in order to determine the retail price; to apply a markup of 100%.