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4. sewage

noun. ['ˈsuːədʒ, ˈsuːɪdʒ'] waste matter carried away in sewers or drains.

Etymology

  • sewage (English)
  • -age (English)
  • -age (Old French (842-ca. 1400))
  • sewer (English)
  • asseour (Anglo-Norman)

6. system

noun. ['ˈsɪstəm'] (physical chemistry) a sample of matter in which substances in different phases are in equilibrium.

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