thymine

noun
thy·​mine | \ ˈthī-ˌmēn How to pronounce thymine (audio) \

Definition of thymine

: a pyrimidine base C5H6N2O2 that is one of the four bases coding genetic information in the polynucleotide chain of DNA — compare adenine, cytosine, guanine, uracil

Examples of thymine in a Sentence

Recent Examples on the Web To do so, researchers typically convert a data file’s string of digital 1s and 0s into combinations of the molecule’s four bases: adenine, guanine, cytosine, and thymine. Robert F. Service, Science | AAAS, "Scientists ‘program’ living bacteria to store data," 11 Jan. 2021 One by one each of the four bases - adenine, thymine, guanine, cytosine, or A, T, G, C - washes over the plate containing Nicholas' exons. Mark Johnson And Kathleen Gallagher, Milwaukee Journal Sentinel, "One in a billion: Researchers seek clues in Nicholas' DNA -- and find more than they expected.," 21 Dec. 2010 All that means is that there’s a genetic variation at a certain location on your genome—for example, a cytosine base instead of thymine at position 42. Caitlin Harrington, Wired, "Your ‘Ethnicity Estimate’ Doesn’t Mean What You Think It Does," 2 Oct. 2020 Instead of hooks and loops, the Velcro has the nucleotides that make up DNA: adenine, cytosine, guanine and thymine. Gaia Squarci, Smithsonian Magazine, "The Virus Hunters," 10 Aug. 2020 In the graphic below, cytosine is replaced with thymine. Courtney Linder, Popular Mechanics, "DNA Is Millions of Times More Efficient Than Your Computer's Hard Drive," 25 July 2020 One serves as a template, laying down sequences of the four bases that make up DNA molecules: adenine (A), thymine (T), guanine (G) and cytosine (C). Lydia Denworth, Scientific American, "A Breakthrough in Genetic Medicine for Rare Diseases," 3 Mar. 2020 In 1953, scientists proposed that DNA is structured as a double helix, with the chemical bases—adenine (A), cytosine (C), guanine (G), and thymine (T)—stacked up in pairs between two intertwining lengths of sugar and phosphate. Ryan Rossotto, National Geographic, "DNA, explained," 12 June 2019 The bases are often referred to as A, C, G and T, the initials of their full chemical names, adenine, cytosine, guanine and thymine. The Economist, "BiotechnologyGene editing takes another step forward," 26 Oct. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'thymine.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of thymine

1894, in the meaning defined above

History and Etymology for thymine

International Scientific Vocabulary, from New Latin thymus

Keep scrolling for more

Learn More about thymine

Time Traveler for thymine

Time Traveler

The first known use of thymine was in 1894

See more words from the same year

Statistics for thymine

Cite this Entry

“Thymine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/thymine. Accessed 15 Apr. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

Keep scrolling for more

More Definitions for thymine

thymine

noun
thy·​mine | \ ˈthī-ˌmēn How to pronounce thymine (audio) \

Medical Definition of thymine

: a pyrimidine base C5H6N2O2 that is one of the four bases coding genetic information in the polynucleotide chain of DNA — compare adenine, cytosine, guanine, uracil

More from Merriam-Webster on thymine

Britannica.com: Encyclopedia article about thymine

Comments on thymine

What made you want to look up thymine? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

Test Your Vocabulary

The Exceptions Quiz III

  • one green toy robot amidst many red toy robots
  • Which of these words does not mean "nonsense"?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Typeshift

Anagram puzzles meet word search.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!