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

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

Photosynthesis is the central process by which plants build up biomass using light, water and the carbon dioxide from the air.

From Science Daily • Apr. 8, 2024

But millions have been left without light, water or heat as winter sets in.

From BBC • Nov. 25, 2022

In addition to plant pathology, the three key elements of light, water and soil will be addressed.

From Seattle Times • Mar. 17, 2022

When the pumping is finished one of these light water wheels is easily carried home on a man's shoulders.

From The Foundations of Japan Notes Made During Journeys Of 6,000 Miles In The Rural Districts As A Basis For A Sounder Knowledge Of The Japanese People by Scott, J.W. Robertson