- hourglass
- sand filter
Generated: This meaning refers to a device that measures the passage of time using sand flowing from one bulb to another. It is commonly used as a timer in various activities.
We use the hourglass to time the competition.
Generated: This meaning refers to a filtration system that uses sand to remove impurities from water or other liquids. It is often used in water purification processes.
We use a sand filter in the swimming pool.