polyadenylic acid

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pol·y·ad·e·nyl·ic acid

n. Abbr. poly(A)
A polymer of adenosine nucleotides that is often attached to eukaryotic messenger RNA and stabilizes the molecule before transport from the nucleus into the cytoplasm.

pol′y•ad•e•nyl′ic ac′id

(ˈpɒl iˌæd nˈɪl ɪk, ˌpɒl-)

a segment of nucleotides composed of adenylic acid residues, appearing at the tail end of messenger RNA after transcription and inducing stability: added to DNA fragments in certain genetic engineering procedures. Also called poly A.
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