CENTERING
ppr. Placing on the center; collecting to a point.
CENTERING Cen "ter *ing, n. (Arch. )
centering
cen ter ing |ˈsentəriNG ˈsɛntərɪŋ | ▶noun Architecture framing used to support an arch or dome while it is under construction.
cen ¦ter |ing ▶noun US spelling of centring.