The father of one of the families was in the habit of balancing the father of another of the families on the top of a great pole; the father of a third family often made a pyramid of both those fathers, with Master Kidderminster for the apex, and himself for the base; all the fathers could dance upon rolling casks, stand upon bottles, catch knives and balls, twirl hand-basins, ride upon anything, jump over everything, and stick at nothing.
There are no more uses of "apex" in the book.
Show samples from other sources
Cables radiate from the apex of the building to the edge beams.
We were rising fast and it seemed like the hollow would miss us, but just as it reached the apex of its jump, one of its tongues shot out and lassoed Emma around the ankle.