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

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Example Sentences

See Examples For:

light water

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

From BBC ● May 14, 2026

Competition for light, water and nutrients immediately sets in.

From Los Angeles Times ● Mar. 13, 2026

"Moreover, in landscapes affected by today's and tomorrow's disturbances, naturalized species can make it even harder for native trees to survive, because competition for light, water, and nutrients intensifies," he adds.

From Science Daily ● Feb. 9, 2026

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

On one side every tree is engaged in a relentless 224 struggle against its neighbors for light, water and food, the three things trees need most.

From Wood and Forest by William Noyes

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