Search Result for "grandchild": 
Wordnet 3.0

NOUN (1)

1. a child of your son or daughter; 



The Collaborative International Dictionary of English v.0.48:

Grandchild \Grand"child"\, n.
   A son's or daughter's child; a child in the second degree of
   descent.
   [1913 Webster]


WordNet (r) 3.0 (2006):

grandchild
    n 1: a child of your son or daughter