- ordinary water, as opposed to heavy water; water containing the normal proportion of deuterium oxide.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for light water
It is somewhere, then, between her light-water load-line and her bilge.The Sea Lions
James Fenimore Cooper
- a name for water (H 2 O), as distinct from heavy water
- Ordinary water, H2O. Compare heavy water.
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