semi- - Dictionary definition and pronunciation - Yahoo! Education
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semi-

pref.
  1. Half: semicircle.
  2. Partial; partially: semiconscious.
  3. Resembling or having some of the characteristics of: semiofficial.
  4. Occurring twice during: semimonthly. See Usage Note at bi-1.
ETYMOLOGY:
Middle English, from Latin smi-, half; see smi- in Indo-European roots


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