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

"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

They say plants need seven things to thrive: room to grow, the right temperature, light, water, air, nutrients and time.

From Los Angeles Times ● Dec. 23, 2022

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

From Seattle Times ● Mar. 17, 2022

Wisconsin, by laws enacted in 1907, put all heat, light, water works, telephone, and street railway companies under the supervision of a single railway commission.

From History of the United States by Beard, Charles A. (Charles Austin)