1. A mixture of toxin and antitoxin used to immunize against a disease

Type of: immunizing agent, immunogen

• Heaviside
• Heaviside layer
• heavy
• heavy cream
• heavy hitter
• heavy hydrogen
• heavy lifting
• heavy metal
• heavy metal music
• heavy particle
• heavy spar
• heavy swell
• heavy water
• heavy weapon
• heavy whipping cream
• heavy-armed
• heavy-coated
• heavy-duty
• heavy-footed
• heavy-handed
• heavy-laden
• heavy-limbed
• heavyhearted
• heavyheartedness
• heavyset