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atactic

American  
[ey-tak-tik] / eɪˈtæk tɪk /

adjective

Chemistry.

  1. (of a polymer) not stereospecific; lacking tacticity.

atactic British  
/ eɪˈtæktɪk /

adjective

  1. chem (of a polymer) having random sequence of the stereochemical arrangement of groups on carbon atoms in the chain; not stereospecific

  2. pathol relating to or displaying ataxia

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of atactic

1955–60; a- 6 + -tactic, back formation from tacticity

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.