atactic

US: (ā tak′tik)

WordReference Random House Unabridged Dictionary of American English © 2025

a•tac•tic  (ā tak′tik), adj. [Chem.]

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

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

WordReference Random House Unabridged Dictionary of American English © 2025

a•tax•i•a  (ə tak′sē ə), n. [Pathol.]

1. Pathology loss of coordination of the muscles, esp. of the extremities.

Also, a•tax•y  (ə tak′sē, a tak′-). Cf. tabes dorsalis. 

• Greek: indiscipline, equivalent. to a- a-⁶ + táx(is) -taxis + -ia -ia
• Neo-Latin
• 1605–15

a•tax′ic, adj. 

Collins Concise English Dictionary © HarperCollins Publishers::

ataxia / əˈtæksɪə/, ataxy / əˈtæksɪ/ noun

1. lack of muscular coordination

Etymology: 17th Century: via New Latin from Greek: lack of coordination, from a-¹ + -taxia, from tassein to put in order

aˈtaxic, aˈtactic adjective