noun
nucleoside
Biochemistry term for a compound consisting of a nucleobase linked to a sugar (ribose or deoxyribose), without a phosphate group.
ヌクレオシドはヌクレオチドの前駆体です。
Nucleosides are precursors of nucleotides.
Loanword from English 'nucleoside', itself derived from 'nucleo-' (nucleus) + '-oside' (sugar derivative).