Definition of Z-DNA in English:

Z-DNA

Syllabification: Z-DNA
Pronunciation: /ˌzēˌdēˌenˈā/

noun

Biochemistry
DNA in which the double helix has a left-handed rather than the usual right-handed twist and the sugar phosphate backbone follows a zigzag course.

Definition of Z-DNA in:

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Word of the day flagitious
Pronunciation: fləˈdʒɪʃəs
adjective
(of a person or their actions) criminal; villainous