"Rhythm (from Greek \u1FE5\u03C5\u03B8\u03BC\u03CC\u03C2, rhythmos, \"any regular recurring motion, symmetry\" (Liddell and Scott 1996)) generally means a \"movement marked by the regulated succession of strong and weak elements, or of opposite or different conditions\" (Anon. 1971, 2537)."@en . . .