Ma'anar ƙamus na kalmar "gidan gida" wani kwaro ne na gama-gari, ƙanana mai tashi wanda galibi ana samunsa a ciki da kuma kewayen mazaunin ɗan adam, yawanci tare da launin toka ko baƙar fata da fikafikai. Sunan kimiyya ga kudancin gida na kowa shine Musca domestica. An san kudaje gida da iya yada cututtuka ta hanyar jigilar kwayoyin cuta daga tushe kamar datti ko najasa zuwa abinci da saman mutane. Hakanan an san su da sautin ƙararraki na musamman da kuma son sha'awar abinci da sauran hanyoyin samar da kwayoyin halitta.