noun Biochemistry.
a nucleoside, C 10 H 14 N 2 O 5 , containing thymine and deoxyribose, that is a constituent of DNA.

blend of thymine and -ide Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
thymidine (ˈθaɪmɪˌdiːn)
the crystalline nucleoside of thymine, found in DNA. Formula: C10H14N2O5
[C20: from thym(ine) + -ide + -ine²]

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

thymidine thy·mi·dine (thī'mĭ-dēn')
A nucleoside composed of thymine and deoxyribose.

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
thymidine   (thī'mĭ-dēn')  Pronunciation Key 
A nucleoside composed of thymine and deoxyribose that (with the addition of phosphate to form the nucleotide thymine) occurs in DNA. Radioactively tagged thymidine has been used in genetics research to study DNA synthesis in the nuclei of cells undergoing cell division. Chemical formula: C10H14N2O5.
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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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