mo·nog·a·my /-mi/
  一夫一妻制
  mo·nog·a·my /-mɪ/ 名詞
  單配偶,單配性
  Mo·nog·a·my n.
  1. Single marriage; marriage with but one person, husband or wife, at the same time; -- opposed to polygamy. Also, one marriage only during life; -- opposed to deuterogamy.
  2. Zool. State of being paired with a single mate.
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  monogamy
       n : having only one spouse at a time [syn: monogamousness]