light water

American  

noun

1. ordinary water, as opposed to heavy water; water containing the normal proportion of deuterium oxide.

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light water British  

noun

1. a name for water (H 2 O), as distinct from heavy water

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light water Scientific  

1. Ordinary water, H ₂ O.

2. Compare heavy water

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Etymology

Origin of light water

First recorded in 1930–35

Example Sentences

See Examples For:

light water

The plants need reliable heat, light, water and nutrients, over many months.

From BBC ● May 14, 2026

The new pools are intended to handle year-round use, incorporating electric pool heaters, salt water and UV light water treatment.

From Los Angeles Times ● Jul. 2, 2025

The reason for this was thought to be that species-rich systems produce more biomass because they can utilise resources such as light, water and nutrients more efficiently.

From Science Daily ● Dec. 13, 2023

It asserts that with its approach, nuclear fuel is used “up to a hundred times better” than in traditional light water reactors.

From Seattle Times ● Sep. 13, 2023

One of the most remarkable points about them is that they require no special materials—each and every one of them makes use of the same common ingredients, earth, air, light, water.

From Heart and Soul by Maveric Post by Victor Mapes