noun[mass noun] British
A fine white sand used in gardening.
- Some fine washed silver sand is flung into the joint to act as a flux, to reduce excess oxygen, and then the work is hauled out again in a another shower of white sparks.
- Plants were grown in washed silver sand in 1.0 l capacity pots.
- Three parts of soil were mixed with one part of silver sand, followed by incorporation of a nutrient mixture and N-labelled ammonium sulfate at 5 ppm.
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