The acorn , or oak nut , is the nut of the oak tree -LRB- genera Quercus , PERSON@1 and PERSON@2 , in the family Fagaceae -RRB- .

The acorn is the fruit of the oak tree -LRB- genera Quercus , PERSON@1 and PERSON@2 , in the family Fagaceae -RRB- .
