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

Type of: hydrogen atom

• lock away
• lock chamber
• lock horns
• lock in
• lock washer
• lock-gate
• lock-up option
• lockable
• lockage
• lockbox
• lockdown
• Locke
• locker
• locker room
• locket
• locking
• locking pliers
• lockjaw
• lockkeeper
• lockman
• lockmaster
• locknut
• lockout
• lockram
• lockring