atactic

adjective
atac·tic | \ (ˌ)ā-ˈtak-tik \

Definition of atactic 

: of, relating to, or being a polymer exhibiting no stereochemical regularity of structure atactic polypropylene — compare isotactic

First Known Use of atactic

1957, in the meaning defined above

History and Etymology for atactic

International Scientific Vocabulary a- entry 2 + -tactic

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The first known use of atactic was in 1957

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atactic

adjective
atac·tic | \ (ˈ)ā-ˈtak-tik \

Medical Definition of atactic 

: lacking regularity or coordination specifically : characterized by ataxia

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