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procedure

mastery

UK /pɹəˈsiːd͡ʒə/ US /pɹəˈsid͡ʒɚ/noun

card 1 of 10 · context meaning

Which meaning of 'procedure' best matches the usage in the sentence?

One of the hidden glories of Victorian engineering is proper drains. Isolating a city’s effluent and shipping it away in underground sewers has probably saved more lives than any medical procedure except vaccination.