Definition of atactic in English:

atactic

adjective

Chemistry
  • (of a polymer or polymer structure) in which the repeating units have no regular stereochemical configuration.

    • ‘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.’
    • ‘But if there is no order, as is the case with the atactic polystyrene, packing can't occur.’
    • ‘Traditional polymer synthesis results in the random (atactic) location of the side-groups either to the left or right of the polymer chain.’

Origin

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

Pronunciation:

atactic

/əˈtaktɪk/