grandniece

The definition of a grandniece is the female child of your niece or nephew.

(noun)

An example of a grandniece is your brother’s granddaughter.

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See grandniece in Webster's New World College Dictionary

noun

the granddaughter of one's brother or sister; great-niece

See grandniece in American Heritage Dictionary 4

noun
A daughter of one's nephew or niece.
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