Sentence:  <WSD>Basining</WSD> is the process that gives the faces of the dies their radius, or concavity. Depending on the production method, the planchet metal flows either toward or away from the center of the dies. The minting facilities "<WSD>basined</WSD>" the dies after they  were delivered from the Philadelphia Mint's Engraving Department. 
Meaning of the word marked with <WSD> tags:  To create a concavity or depression in.