pentose

[pen-tohs]
noun Chemistry.
a monosaccharide containing five atoms of carbon, as xylose, C 5 H 1 0 O 5 , or produced from pentosans by hydrolysis.

Origin:
< German (1890); see pent(a)-, -ose2

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Collins
World English Dictionary
pentose (ˈpɛntəʊs)
 
n
any monosaccharide containing five atoms of carbon per molecule: occur mainly in plants and the nucleic acids
 
[C20: from penta- + -ose²]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

pentose pen·tose (pěn'tōs', -tōz')
n.
Any of a class of monosaccharides having five carbon atoms per molecule and including ribose and several other sugars.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
pentose   (pěn'tōs')  Pronunciation Key 
Any of a class of simple sugars (monosaccharides) having five carbon atoms per molecule. Ribose and deoxyribose are pentoses.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
They are mostly sugar derivatives, hexose, pentose and citrate.
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