The Collaborative International Dictionary of English v.0.48:

Accent \Ac*cent"\, v. t. [imp. & p. p. Accented; p. pr. & vb.
   n. Accenting.] [OF. accenter, F. accentuer.]
   [1913 Webster]
   1. To express the accent of (either by the voice or by a
      mark); to utter or to mark with accent.
      [1913 Webster]

   2. To mark emphatically; to emphasize.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

accented \accented\ adj.
   1. (Phonology) having the main stress of a word; -- used of
      syllables

   Syn: tonic (vs. atonic)
        [WordNet 1.5]

   2. 1 being pronounced with sterss; -- used of syllables

   Syn: heavy, strong
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

accented
    adj 1: used of syllables; "a tonic syllables carries the main
           stress in a word" [syn: tonic, accented] [ant:
           atonic, unaccented]
    2: bearing a stress or accent; "an iambic foot consists of an
       unstressed syllable followed by a stressed syllable as in
       `delay'" [syn: stressed, accented] [ant: unstressed]