acetum

The name acetone derives from the Latin root acetum for acetic acid by adding "one" meaning "daughter of" because it was obtained from the acid.

(76) Ibid., 79: "Denique ut acetum, nisi vinum sit corruptum, ita quae sincera sunt & vera, risum excitare non possunt." Heinsius then quotes Quintilian 6.3.89, to the effect that witty expression depends on saying things "other than what is correct and true" (ibid.: "aliter quam est rectum verumque").

For example, in lieu of a proper proper name, "acetabula quidquid habent": certain flasks are always called vinegar (acetum) flasks, no matter what liquid they literally contain.