pyrimidine

American

[pahy-rim-i-deen, pi-, pir-uh-mi-deen, -din] / paɪˈrɪm ɪˌdin, pɪ-, ˈpɪr ə mɪˌdin, -dɪn /

noun

Biochemistry.

a heterocyclic compound, C 4 H 4 N 2 , that is the basis of several important biochemical substances.
one of several pyrimidine derivatives, especially the bases cytosine, thymine, and uracil, which are fundamental constituents of nucleic acids.

pyrimidine British

/ paɪˈrɪmɪˌdiːn /

noun

a liquid or crystalline organic compound with a penetrating odour; 1,3-diazine. It is a weakly basic soluble heterocyclic compound and can be prepared from barbituric acid. Formula: C 4 H 4 N 2
Also called: pyrimidine base. any of a number of similar compounds having a basic structure that is derived from pyrimidine, including cytosine, thymine, and uracil, which are constituents of nucleic acids

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

pyrimidine Scientific

/ pī-rĭm′ĭ-dēn′ /

Any of a group of organic compounds having a single six-member ring in which the first and third atoms are nitrogen and the rest are carbon. Pyrimidines include the bases cytosine, thymine, and uracil, which are components of DNA and RNA. Pyrimidine rings are also components of several larger compounds, such as thiamine and some synthetic barbiturates.

Etymology

Origin of pyrimidine

1880–85; blend of pyridine and imide

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

pyrimidine

Most of the genes they found that were essential to cell survival in low-glucose tumor environments were also involved in pyrimidine synthesis, a precise biological pathway targeted by many chemotherapies.

From Science Daily ● Nov. 26, 2024

Cancer cells must have access to pyrimidine supplies to produce more cancer cells and to produce uridine nucleotides, a primary fuel source for cancer cells as they rapidly reproduce, grow, and die.

From Science Daily ● Nov. 26, 2024

Bonds in the purine and pyrimidine rings of nucleic acids are broken by high-energy uv radiation.

From Textbooks ● Jun. 9, 2022

This repair mechanism is often employed when UV exposure causes the formation of pyrimidine dimers.

From Textbooks ● Jun. 9, 2022

This could only mean that the 3.4 A-thick purine and pyrimidine bases were stacked on top of each other in a direction perpendicular to the helical axis.

From "Double Helix" by James D. Watson

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023