accentual

from WordNet (r) 3.0 (2006)

accentual
    adj 1: of or pertaining to accent or stress
    2: (of verse) having a metric system based on stress rather than
       syllables or quantity; "accentual poetry is based on the
       number of stresses in a line"; "accentual rhythm" [ant:
       {quantitative}, {syllabic}]

from The Collaborative International Dictionary of English v.0.48

Accentual \Ac*cen"tu*al\, a.
   Of or pertaining to accent; characterized or formed by
   accent.
   [1913 Webster]