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 line

Type of: state boundary, state line

• hectometer
• hectometre
• hector
• Hector Berlioz
• Hector Hevodidbon
• Hector Hugh Munro
• heddle
• Hedeoma
• hedeoma oil
• Hedeoma pulegioides
• Hedera
• Hedera helix
• hedge
• hedge bindweed
• hedge garlic
• hedge in
• hedge maple
• hedge mustard
• hedge nettle
• hedge pink
• hedge sparrow
• hedge thorn
• hedge trimmer
• hedge violet
• hedged