Wiktionary
greatgrandchildren
n. (alternative form of great-grandchildren nodot=1 English); (plural of greatgrandchild nocap=1 English)
Usage examples of "greatgrandchildren".
Onofre behind the wheel, and with his greatgrandchildren Chemo and Chepa in back, came down the road toward Joe and lurched to a stop: Onofre waved and then beeped for Joe to pull over a little, and Joe gave him the finger.
Frail-looking Admiral Demora Sulu arrived with two of her greatgrandchildren, all descendants of Hikaru Sulu.
He had nine hundred and thirty-eight greatgrandchildren and they were living packed into sardine-can cities on nameless worlds, looking for places to play.
It would give me an idea of what my greatgrandchildren will look like.