资料来源 : pyDict

侄孙;侄外孙

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Grandnephew \Grand"neph"ew\, n.
   The grandson of one's brother or sister.

资料来源 : WordNet®

grandnephew
     n : a son of your niece or nephew [syn: {great-nephew}]