n.
Pronunciation: ( ˌ )sham-p ē - ' ny ō n, ( ˌ )shäm-, - ' ny ō n ; sham- ' pin-y ə n, cham-
Function: noun
Etymology: French, from Middle French, alteration of champigneul, ultimately from Late Latin campania
Date: 1670
: an edible fungus especially : BUTTON MUSHROOM