diametric

As adjectives the difference between diametric and diagonal

is that diametric is directly opposite while diagonal is (geometry) joining two nonadjacent vertices (of a polygon or polyhedron).

As a noun diagonal is

something arranged diagonally or obliquely.

As adjectives the difference between dialectic and diametric

is that dialectic is dialectical while diametric is directly opposite.

As a noun dialectic

is any formal system of reasoning that arrives at a truth by the exchange of logical arguments.

As adjectives the difference between diametric and dialectical

is that diametric is directly opposite while dialectical is of, or pertaining to dialectic; logically reasoned through the exchange of opposing ideas.

As an adjective diametric

is directly opposite.

As an initialism DIA is

Defense Intelligence Agency

As adjectives the difference between diametric and metric

is that diametric is directly opposite while metric is of or relating to the metric system of measurement.

As a noun metric is

a measure for something; a means of deriving a quantitative measurement or approximation for otherwise qualitative phenomena (especially used in Software Engineering.

As a verb metric is

to measure or analyse statistical data concerning the quality or effectiveness of a process.

As an adjective diametric

is directly opposite.

As a noun trick is

trick.

As adjectives the difference between diametric and dimetric

is that diametric is directly opposite while dimetric is (crystallography) tetragonal.