poly·syl·la·ble /ˈpɑliˌsɪləbəl, ˌpɑliˈ/
  多音節字
  Pol·y·syl·la·ble n.  A word of many syllables, or consisting of more syllables than three; -- words of less than four syllables being called monosyllables, dissyllables, and trisyllables.
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  polysyllable
       n : a word of more than three syllables [syn: polysyllabic word]