niece /ˈnis/
  姪女,甥女
  Niece n.
  1. A relative, in general; especially, a descendant, whether male or female; a granddaughter or a grandson. [Obs.]
  2. Especially: A daughter of one's brother or sister, or of one's brother-in-law or sister-in-law.  In modern English, this is the primary meaning.
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  niece
       n : a daughter of your brother or sister [ant: nephew]