[noo-klee-uh-sahyd, nyoo-] /ˈnu kli əˌsaɪd, ˈnyu-/
any of the class of compounds derived by the hydrolysis of nucleic acids or nucleotides, consisting typically of deoxyribose or ribose combined with adenine, guanine, cytosine, uracil, or thymine.
(biochem) a compound containing a purine or pyrimidine base linked to a sugar (usually ribose or deoxyribose)
nucleoside nu·cle·o·side (nōō’klē-ə-sīd’, nyōō’-)
Any of various compounds consisting of a sugar, usually ribose or deoxyribose, and a purine or pyrimidine base, especially a compound obtained by hydrolysis of a nucleic acid, such as adenosine or guanine.
Any of various compounds consisting of a sugar, usually ribose or deoxyribose, and a nitrogen base (a purine or pyrimidine). Nucleosides are constituents of the nucleotides of nucleic acids. Adenosine and thymidine are nucleosides.
- Nucleoside analogue
nucleoside analogue n. Any of a group of antiviral drugs, including AZT, DDC, and DDI, that interfere with the activity of the viral enzyme reverse transcriptase and are used in the treatment of HIV. nucleoside analogue Any of a group of antiviral drugs that interfere with the activity of the viral enzyme reverse transcriptase and […]
[noo-klee-uh-sohm, nyoo-] /ˈnu kli əˌsoʊm, ˈnyu-/ noun, Cell Biology. 1. any of the repeating subunits of chromatin occurring at intervals along a strand of DNA, consisting of DNA coiled around histone. /ˈnjuːklɪəˌsəʊm/ noun 1. a repeating structural unit of chromatin that contains DNA and histones nucleosome nu·cle·o·some (nōō’klē-ə-sōm’, nyōō’-) n. Any of the repeating subunits […]
[noo-klee-oh-sin-thuh-sis, nyoo-] /ˌnu kli oʊˈsɪn θə sɪs, ˌnyu-/ noun, Physics, Astronomy. 1. the formation of new atomic nuclei by nuclear reactions, thought to occur in the interiors of stars and in the early stages of development of the universe. /ˌnjuːklɪəʊˈsɪnθɪsɪs/ noun 1. (astronomy) the formation of heavier elements from lighter elements by nuclear fusion in […]
nucleotidase nu·cle·o·ti·dase (nōō’klē-ə-tī’dās, -dāz, nyōō’-) n. An enzyme that catalyzes the hydrolysis of a nucleotide to a nucleoside and phosphoric acid.