Quid pro quo
From Wikipedia, the free encyclopedia
The phrase means the same thing as the English saying "a tit for a tat", or trading something for something else. It can also mean the same thing as "an eye for an eye".
Lawyers sometimes use this saying to mean "an even trade".
- Robertson, John G. (1991). Robertson's Words for a Modern Age: A Cross Reference of Latin and Greek Combining Elements, p. 249.