noun /njuːˈkliː.ɪk ˈæsɪd,njuːˈkleɪ.ɪk ˈæsɪd,nuˈkleɪ.ɪk ˈæsɪd/
Any acidic, chainlike biological macromolecule consisting of multiply repeat units of phosphoric acid, sugar and purine and pyrimidine bases; they are involved in the preservation, replication and expression of hereditary information in every living cell
Wikipedia foundation.