1. The boundary between Maryland and Pennsylvania; symbolic dividing line between North and South before the American Civil War
   - Mason-Dixon line, Mason and Dixon's line

Type of: state boundary, state line

• card catalogue
• card game
• card index
• card player
• card reader
• card shark
• card table
• card trick
• card-carrying
• card-playing
• Cardamine
• Cardamine bulbifera
• Cardamine bulbosa
• Cardamine diphylla
• Cardamine douglasii
• Cardamine pratensis
• Cardamine rotundifolia
• cardamom
• cardamon
• cardamum
• cardboard
• cardboard city
• cardcase
• cardcastle
• carder