night soil

night soil (uncountable)

  1. (archaic, euphemistic) Human faeces.
    • 1977, Hillel I. Shuval, Water Renovation and Reuse, ISBN 9780126412505 :
      There, the night soil along with the community refuse is filled in trenches for composting and subsequent use in agriculture.
    • 2006, Mario Giampietro et al. "Can Biofuels replace Fossil Energy Fuels?" International Journal of Transdisciplinary Research, vol. 1, no. 1, p. 58:
      The flow of nitrogen from night-soil in rural China is valuable, whereas human excrement in an urban center is a pollution problem.
  • Russian: ночно́е зо́лото

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