[uh-den-uh-seen, -sin]
Biochemistry. a white, crystalline, water-soluble nucleoside, C 10 H 13 N 5 O 4 , of adenine and ribose.

1905–10; < German Adenosin, blend of Adenin adenine and Ribose ribose Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
adenosine (æˈdɛnəˌsiːn, ˌædɪˈnəʊsiːn)
biochem a nucleoside formed by the condensation of adenine and ribose. It is present in all living cells in a combined form, as in ribonucleic acids. Formula: C10H13N5O4
[C20: a blend of adenine + ribose]

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

adenosine a·den·o·sine (ə-děn'ə-sēn')
A nucleoside that is a structural component of nucleic acids and the major molecular component of ADP, AMP, and ATP.

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
adenosine   (ə-děn'ə-sēn')  Pronunciation Key 
A compound consisting of adenine combined with ribose. Adenosine is one of the nucleotides in DNA and is also a component of ADP, AMP, and ATP. Chemical formula: C10H13N5O4.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Medicines through a vein, including adenosine and verapamil.
These include adenosine, antiarrhythmics, and amiodarone.
Caffeine is an antagonist for the neurotransmitter adenosine.
Yet caffeine has only one known mechanism of action at likely doses: occupation and blockade of adenosine receptors.
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