round-off
/ˈraʊndɒf/noun
1The act of rounding something off. Compare to round off.
2An instance of rounding a number off; = rounding.
3 Gymnastics. An exercise similar to a cartwheel, in which the gymnast closes his or her legs on reaching a vertical position, and executes a quarter turn to land with the back to the direction of travel. Also called Arab spring, (occasionally) Arabian spring.
Origin
Early 19th century (in an earlier sense). From to round off.