nonsynchronous

adjective

non·​syn·​chro·​nous ˌnän-ˈsiŋ-krə-nəs 

-ˈsin-

: not synchronous : not happening, moving, or existing at the same time

Such nonsynchronous rotation had originally been proposed as a consequence of a supposed lack of permanent mass asymmetry within a dominantly fluid Europa …

—William B. McKinnon

Any camera and recorder can be used to record nonsynchronous, double system sound …

—Edward Pincus and Steven Ascher

nonsynchronous assembly lines

Word History

First Known Use

1830, in the meaning defined above