Idiomatic \Id`i*o*mat"ic\, Idiomatical \Id`i*o*mat"ic*al\, a. [Gr. ?.]

Of or pertaining to, or conforming to, the mode of expression peculiar to a language; as, an idiomatic meaning; an idiomatic phrase. -- Id`i*o*mat"ic*al*ly, adv.

Source: Webster's Revised Unabridged Dictionary (1913)