1. A hydrogen atom in an acid that forms a positive ion when the acid dissociates
   - acidic hydrogen

Type of: hydrogen atom

• lower respiratory infection
• lower respiratory tract
• lower respiratory tract smear
• Lower Saxony
• lower status
• Lower Tunguska
• lower-case letter
• lower-middle-class
• Lower-Normandy
• lower-ranking
• lowercase
• lowerclassman
• lowered
• lowering
• loweringly
• lowermost
• lowery
• lowest
• lowest common denominator
• lowest common multiple
• lowland
• lowland burrowing treefrog
• lowland fir
• Lowland Scot
• lowland white fir