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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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.