DNA

play
noun \ˌdē-ˌen-ˈā\

Definition of DNA

  1. :  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 1base 7b) 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

Illustration of dna

Origin and Etymology of dna

deoxyribonucleic acid


First Known Use: 1944

Other Genetics Terms


DNA Defined for English Language Learners

DNA

play
noun \ˌdē-ˌen-ˈā\

Definition of DNA for English Language Learners

  • : a substance that carries genetic information in the cells of plants and animals


Medical Dictionary

DNA

play
noun \ˌdē-ˌen-ˈā\

Medical Definition of DNA

  1. :  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 dna

Illustration of dna




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