Definitions

1. noun

a nucleoside consisting of the sugar D-ribose and the base cytosine

“Cytidine is a pyrimidine nucleoside found in RNA.”

2. noun

a constituent of nucleic acids, especially RNA, involved in the synthesis of DNA

“Cytidine is an essential component of the nucleic acid chain.”

3. chemistry

a compound of the formula C9H13N3O4, used in biochemistry and molecular biology

“Cytidine is a purine nucleoside used in DNA synthesis.”