Acrobatic Move Like a Cartwheel With Feet Together

This page is the CodyCross answer for the clue below from Physics, Group 1882, Puzzle 4 (Cosmologist).

Question is: Acrobatic Move Like a Cartwheel With Feet Together

and the answer is: ROUNDOFF

Word Meaning:

ROUND OFF — (transitive) To change the shape of (an object) to make it smoother and especially more circular or ovoid.

Definitions from Wiktionary.