MEANING: noun: A discussion employed in investigating the truth of a thesis.
adjective: Relating to such a discussion.

ETYMOLOGY: From Greek dia- (between) + legein (to speak). Earliest documented use: 1382.

DIALECTRIC - a constant insulating property

DUALECTIC - voting for two candidates

DIATECTIC - a mixture consisting of two fluids, of uniform composition despite transforming from gas to liquid state or back