Examples from the Web for yb
The three courses below are octagonal, with their sides set across the angles of the innermost octagon, Yb.
But the limits of the height of Yb may be thus generally stated.
There is surely still an appearance of separation between Xb and Yb, as if the one might slip off the other.
So does Adou's extraordinarily tall brother, Yb,—my guide among the mountains.Two Years in the French West Indies|Lafcadio Hearn
Under such circumstances, it is well to exhibit the lower tiers of the foundation as well as Yb and Xb.