Word not found in any official scrabble dictionaries.
"Great-niece" Definition
noun
Granddaughter of one’s sibling or sibling's spouse, daughter of one’s nephew or niece, one's sibling's child's female child.
Source: Wiktionary
One’s son’s or daughter's niece.
Source: Wiktionary
A daughter of one's niece or nephew.
A daughter of your niece or nephew.
Source: Wordnet
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