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

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

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

In the bottom of the valley it was never really light, water flowed across the roads, and the low-standing farmsteads reeked with damp.

From The Buccaneer Farmer Published in England under the Title "Askew's Victory" by Bindloss, Harold