Adjective has 2 senses

• accentual(a = adj.pert) - of or pertaining to accent or stress;
Derived form noun accent₄, noun accent₅

• accentual(a = adj.all) - (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"
Antonym: quantitative, syllabic
Derived form noun accent₄