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nucleotides

 - 6 dictionary results

nu⋅cle⋅o⋅tide

[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; alter. of nucleoside
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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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.

[Alteration of nucleoside.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Cultural Dictionary

nucleotides [(nooh-klee-uh-teyedz)]

The molecules that form the basic modular structure of the double helix of the DNA molecule. A nucleotide consists of three molecules — a sugar, a phosphate group, and a molecule called a base. If the double helix is a twisted ladder, the sugar and phosphates form the sides of the ladder and pairs of bases form the rungs. There are four different bases, usually abbreviated A, C, G, and T for adenine, cytosine, guanine, and thymine). The order of bases in DNA determines the genetic code.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: nu·cle·o·tide
Pronunciation: 'n(y)ü-klE-&-"tId
Function: noun
: any of several compounds that consist of a riboseor deoxyribose sugar joined to a purine or pyrimidine base and to a phosphate group and that are the basic structural units of RNA and DNA —compare NUCLEOSIDE
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

nucleotide nu·cle·o·tide (n&oomacr;'klē-ə-tīd', ny&oomacr;'-)
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
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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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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