Water-column definition

The vertical expanse of water lying between an area on the surface of a body of water and the floor directly below it but excluding the surface and the floor.
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(environmental sciences, hydrology) A notional column of water from the surface to the bottom in a natural setting, notable for the differences in physical and chemical properties at various depths.
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(deep-sea diving) The zone in which ascent and descent occur.
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Other Word Forms

Noun

Singular:
water-column
Plural:
water columns