Diction

Choice of words for the expression of ideas; the construction, disposition, and application of words in discourse, with regard to clearness, accuracy, variety, etc.; mode of expression; language; as, the diction of Chaucer's poems.

the manner in which something is expressed in words; "use concise military verbiage" - G.S.Patton

the articulation of speech regarded from the point of view of its intelligibility to the audience