/
ˌdʌɪəˈlɛktɪk/
n.
 
(also 
dialectics)
 
[
usu. treated as sing.]
   
- the art of investigating or discussing the truth of opinions.
 - enquiry into metaphysical contradictions and their solutions.
 - the existence or action of opposing social forces, concepts, etc.
 
adj.
 relating to dialectic or dialectics; dialectical.
Etymology
ME: from OFr. dialectique or L. dialectica, from Gk dialektikē (tekhnē) ‘(art) of debate’, from dialegesthai (see dialogue).