phosphodiester bond

n.
The covalent chemical bond that holds together the polynucleotide chains of RNA and DNA by joining a carbon in the pentose sugar of one nucleotide to a carbon in the pentose sugar of the adjacent nucleotide.

[PHOSPHO- + DI-¹ + ESTER.]

(fŏs'fō-dī-ĕs'tər)
n.

The covalent chemical bond that holds together the polynucleotide chains of RNA and DNA by joining a specific carbon in the phosphate group in a sugar having five carobs, such as ribose, to a specific carbon in the hydroxyl group of the five-carbon sugar in the adjacent nucleotide.