atactic

atactic [ey-tak-tik] Word Origin adjective Chemistry.

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

Origin of atactic 1955–60; a-6 + -tactic, back formation from tacticity British Dictionary definitions for atactic atactic 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