[rahy-boh-noo-klee-uh-sahyd, -nyoo-]
noun Biochemistry.
a ribonucleotide precursor that contains ribose and a purine or pyrimidine base.

1930–35; ribo(nucleic acid) + nucleoside

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Medical Dictionary

ribonucleoside ri·bo·nu·cle·o·side (rī'bō-nōō'klē-ə-sīd', -nyōō'-)
A nucleoside that contains ribose as its sugar component; as in uridine.

The American Heritage® Stedman's Medical Dictionary
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