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3 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 lu·na·tion /luˈneʃən/
 陰曆月

From: Webster's Revised Unabridged Dictionary (1913)

 Lu·na·tion n.  The period of a synodic revolution of the moon, or the time from one new moon to the next; varying in length, at different times, from about 29¼ to 29⅚ days, the average length being 29 d., 12h., 44m., 2.9s.
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From: WordNet (r) 2.0

 lunation
      n : the period between successive new moons (29.531 days) [syn:
          lunar month, moon, synodic month]