perpetuum mobile
Concise Oxford English Dictionary © 2008 Oxford University Press:
perpetuum mobile /pəːˌpɛtjʊəm ˈməʊbɪleɪ, ˈməʊbɪli/
▶noun
- 1 another term for perpetual motion.
- 2 Music another term for moto perpetuo.
– origin L., lit. ‘continuously moving (thing)’, on the pattern of primum mobile.
'perpetuum mobile' also found in these Oxford entries:

