syn·i·ze·sis /ˌsɪnəˈzisəs/
  Syn·i·ze·sis n.
  1. Med. An obliteration of the pupil of the eye.
  2. Gram. A contraction of two syllables into one; synecphonesis.
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  synizesis
       n : the contraction of chromatin towards one side of the nucleus
           during the prophase of meiosis [syn: synezesis]