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DNA

1 ENTRIES FOUND:
DNA /ˌdiːˌɛnˈeɪ/ noun
DNA
/ˌdiːˌɛnˈeɪ/
noun
Learner's definition of DNA
[noncount]
: a substance that carries genetic information in the cells of plants and animals脱氧核糖核酸(动植物细胞中携带基因信息的物质)often used before another noun常用于另一名词前
DNA is an abbreviation of “deoxyribonucleic acid.”*DNA是deoxyribonucleic acid的缩略词。
compare nucleic acid, rna
: 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

Illustration of DNA

Illustration of dna
  • A molecular model

Word History

Etymology

deoxyribonucleic acid

First Known Use

1944, in the meaning defined above

Time Traveler
The first known use of DNA was in 1944

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