Nucleic acid
WordNet
noun
(1) (biochemistry) any of various macromolecules composed of nucleotide chains that are vital constituents of all living cells
WiktionaryText
Noun
- 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