Wiktionary
n. (context biochemistry English) A polymeric macromolecule composed of many nucleotides; examples include DNA and RNA
Wikipedia
A polynucleotide molecule is a biopolymer composed of 13 or more nucleotide monomers covalently bonded in a chain. DNA (deoxyribonucleic acid) and RNA (ribonucleic acid) are examples of polynucleotides with distinct biological function. The prefix poly comes from the ancient Greek πολυς (polys, many). DNA consists of two chains of polynucleotides, with each chain in the form of a helical spiral.
Usage examples of "polynucleotide".
There are two main families of polynucleotides in living cells, called DNA and RNA for short.
Tissue centrifuge sorters provided specimen flow to racked analyzers—matrix and variable-probe sequencers specializing in polynucleotides, RNAs and DNAs.