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

Around 95% of plants use C3 photosynthesis, in which mesophyll cells -- green spongy cells that live inside leaves -- turn light, water, and carbon dioxide into plant-powering sugars.

From Science Daily ● Nov. 20, 2024

The forest also includes handmade sculptures, animatronic robots, original music and glimmering installations that alternately employ mirrors, light, water and shadows to create a range of visual trickery.

From Los Angeles Times ● May 12, 2022

Nearly 1,000 towns and villages have been completely deprived of light, water and heat, he said.

From New York Times ● Mar. 7, 2022

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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