Where does the word champignon come from?

Answer 1

The English word champignon, which refers to a particular type of mushroom, is borrowed directly from the French champignon, which happens to mean any mushroom in general, not just one kind.

The history of champignon before its usage by the French, however, is disputed.

Some say that it originates from the Latin campus "level ground", that became the late Latin campania, which became the Old French champagne "open country". Champignonis presumed to be the diminutive form of champagne, and came to mean a type of mushroom in the English language in the 16th century.

Others tie champignon directly to the vulgar Latin word, campinus.