Source : Webster's Revised Unabridged Dictionary (1913)

Accentuation \Ac*cen`tu*a"tion\, n. [LL. accentuatio: cf. F.
   accentuation.]
   Act of accentuating; applications of accent. Specifically
   (Eccles. Mus.), pitch or modulation of the voice in reciting
   portions of the liturgy.

Source : WordNet®

accentuation
     n 1: the use or application of an accent; the relative prominence
          of syllables in a phrase or utterance
     2: the act of giving special importance or significance to
        something [syn: {emphasizing}, {accenting}]