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

Type of: hydrogen atom

• sickle cell
• sickle feather
• sickle lucerne
• sickle medick
• sickle-cell anaemia
• sickle-cell anemia
• sickle-cell disease
• sickle-shaped
• sicklebill
• sicklepod
• sickleweed golden aster
• sickly
• sickness
• sickness benefit
• sicko
• sickroom
• Sid Caesar
• Sida
• Sida hermaphrodita
• Sida rhombifolia
• Sida spinosa
• Sidalcea
• Sidalcea malviflora
• Siddhartha
• Siddons