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deratization

[dee-rat-uh-zey-shuh n]
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noun
  1. extermination of rats, especially aboard a merchant vessel.
Also especially British, de·rat·i·sa·tion.

Origin of deratization

First recorded in 1910–15; deratize + -ation
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018