Definition of atactic in English:

Share this entry


Pronunciation: /āˈtaktik/


(Of a polymer or polymer structure) in which the repeating units have no regular stereochemical configuration.
Example sentences
  • Depending on the location of the side groups and the nature of the starting monomers, linear polymers can have various structural isomers denoted as isotactic, syndiotactic, or atactic.
  • Traditional polymer synthesis results in the random (atactic) location of the side-groups either to the left or right of the polymer chain.
  • But if there is no order, as is the case with the atactic polystyrene, packing can't occur.


Mid 19th century: from Greek ataktos, from a- 'not' + taktos 'arranged' + -ic.

For editors and proofreaders

Syllabification: a·tac·tic

Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.