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DNA
noun
: any of various nucleic acids that are usually the molecular basis of heredity, are constructed of a double helix held together by hydrogen bonds between purine and pyrimidine bases (see base entry 1 sense 6b) which project inward from two chains containing alternate links of deoxyribose and phosphate, and that in eukaryotes are localized chiefly in cell nuclei compare recombinant dna
Examples of DNA in a Sentence
Recent Examples on the Web
The new species was identified by its coloring, wing patterns, body shape, appearance at different life stages and DNA, the study said.
—Aspen Pflughoeft, Miami Herald, 6 June 2024
Greitens said in his order that contemporary forensic tests had revealed DNA on the murder weapon did not match Williams, and noted that the testing did not exist at the time of his criminal trial.
—Emily Mae Czachor, CBS News, 5 June 2024
Conglomerating was never part of its DNA, pushing the company to diversify no matter what.
—Bygeoff Colvin, Fortune, 4 June 2024
The new species was identified by its scale pattern, coloring, other subtle physical features and DNA, the study said.
—Aspen Pflughoeft, Miami Herald, 24 May 2024
Handling bodies correctly and in a timely manner allows Ukrainian families to find closure and Russians to have a proper starting point for their DNA analyses.
—Dominique Soguel, The Christian Science Monitor, 23 May 2024
The detectives requested a DNA swab from Walker in order to rule him out as a suspect, and Walker refused, according to the affidavit.
—Harriet Ramos, Fort Worth Star-Telegram, 23 May 2024
The test works by looking for cancer signals from DNA shed by tumors in the blood stream.
—Bruce Gil, Quartz, 23 May 2024
So far, that effort has identified three men based on DNA extracted from the bones.
—CBS News, 22 May 2024
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'DNA.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Word History
Etymology
deoxyribonucleic acid
First Known Use
1944, in the meaning defined above
Phrases Containing DNA
Dictionary Entries Near DNA
Cite this Entry
“DNA.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/DNA. Accessed 14 Jun. 2024.
Kids Definition
DNA
noun
: any of various nucleic acids that are located especially in cell nuclei, are usually the chemical basis of heredity, and are composed of two nucleotide chains held together by hydrogen bonds in a pattern resembling a flexible twisted ladder compare rna
Medical Definition
DNA
noun
: any of various nucleic acids that are usually the molecular basis of heredity, are constructed of a double helix held together by hydrogen bonds between purine and pyrimidine bases which project inward from two chains containing alternate links of deoxyribose and phosphate, and that in eukaryotes are localized chiefly in cell nuclei
called also deoxyribonucleic acid
see recombinant dnaMore from Merriam-Webster on DNA
Britannica.com: Encyclopedia article about DNA
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Merriam-Webster unabridged
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