nucleotide

[noo-klee-uh-tahyd, nyoo-]
noun Biochemistry.
any of a group of molecules that, when linked together, form the building blocks of DNA or RNA: composed of a phosphate group, the bases adenine, cytosine, guanine, and thymine, and a pentose sugar, in RNA the thymine base being replaced by uracil.

Origin:
1905–10; alteration of nucleoside

internucleotide, adjective
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World English Dictionary
nucleotide (ˈnjuːklɪəˌtaɪd)
 
n
biochem a compound consisting of a nucleoside linked to phosphoric acid. Nucleic acids are made up of long chains (polynucleotides) of such compounds
 
[C20: from nucleo- + t (added for ease of pronunciation) + -ide]

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Medical Dictionary

nucleotide nu·cle·o·tide (nōō'klē-ə-tīd', nyōō'-)
n.
Any of various compounds consisting of a nucleoside combined with a phosphate group and forming the basic constituent of DNA and RNA.

The American Heritage® Stedman's Medical Dictionary
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Science Dictionary
nucleotide   (n'klē-ə-tīd')  Pronunciation Key 
Any of a group of organic compounds composed of a nucleoside linked to a phosphate group. Nucleotides are the basic building blocks of nucleic acids.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
The hardest part was finding the right reference number for the nucleotide sequence.
Translation is controlled by various enzymes that recognize specific nucleotide sequences.
Novelty at the nucleotide level comes from mutations.
Many nucleotide differences are neutral-both the mutation and the normal gene cause the same protein to be made.
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