Wiktionary
metaboles
n. (plural of metabole English)
Wikipedia
Métaboles
Métaboles is an orchestral work by Henri Dutilleux, commissioned by the conductor George Szell in 1959 to mark the fortieth anniversary of the Cleveland Orchestra. Métaboles was composed in 1963–64 and was first performed by Szell and the Cleveland Orchestra on 14 January 1965.