"Avunculate" validity in different word game dictionaries

Dictionary Validity
Scrabble US(US/Canada/Thailand - TWL/NWL) No
Scrabble UK(International - SOWPODS/CSW) Yes
Words with Friends(WWF) Yes

"avunculate" Definition

  1. a special relationship obtaining among some tribal peoples between a nephew and his maternal uncle
  2. authority of a man over his sister's family affairs but especially over her children and the reciprocal rights and responsibilities associated therewith— compare AMITATE

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