Ma'anar ƙamus na kalmar "atrium" babban zaure ne ko kuma buɗaɗɗen sarari a cikin gini, yawanci wanda ke kewaye da colonnade ko portico. A cikin jiki, yana nufin ɗaki ko rami, musamman ko ɗaya daga cikin ɗakuna biyu na sama na zuciya, wanda ke karɓar jini daga jijiyoyi kuma ya tilasta shi cikin ventricle. Kalmar "atrium" ta fito daga kalmar Latin "atrium," wanda ke nufin "zauren shiga" ko "babban dakin."