fluid

Everyday

1. A fluid is a substance that can flow, such as a liquid or a gas. tree →
2. Fluids often means liquids you drink, like water and juice. tree →
3. As an adjective, fluid means moving smoothly and easily, or able to change. tree →

In the lessons

In science fluids take the shape of their container and flow; air and water are both fluids. In health lessons you «drink plenty of fluids» when ill or hot. Phrases: «drink fluids», «body fluids», «cleaning fluid», «fluid movements».

Examples

• Water and air are both fluids. tree →
• When you have a fever, drink plenty of fluids. tree →
• The nurse checked how much fluid the patient drank. tree →
• The dancer's movements were fluid and graceful. tree →
• Brake fluid helps a car stop. tree →
• Keep cleaning fluids away from little children. tree →
• Our plans are still fluid. tree →
• The Fox and the Hare are sent in quest of the magic fluid. tree →

Note

Countable or uncountable. Pronounced FLOO-id. Trap: «fluid» is not only liquid — gases are fluids too. Never drink a fluid from an unlabelled bottle; it could be poisonous.