D defs.my
Entry 1 sense Webster, 1913

Grandchild

/grăn'-dchīldˌ/ · Grand·child · IPA /ɡrˈændtʃˌaɪld/
01 n. A son's or daughter's child; a child in the second degree of descent.
  1. 1.
    A son's or daughter's child; a child in the second degree of descent.