Kalmar “binuclear” sifa ce da ke bayyana wani abu da ya qunshi ko ya qunshi nuklei biyu. Yawancin lokaci ana amfani da shi a cikin mahallin sunadarai da kimiyyar lissafi don komawa ga kwayoyin halitta, mahadi, ko barbashi da ke da kwayoyin atomic guda biyu, irin su binuclear complexes ko binuclear molecules. A ilmin halitta, “binuclear” kuma na iya komawa ga sel masu dauke da kwayoyin halitta guda biyu, kamar yadda ake yi a wasu nau’in fungi ko kwayoyin tsoka.