asynchronous
adjective
[ eɪˈsɪŋkrənəs ]
• not existing or occurring at the same time.
• controlling the timing of operations by the use of pulses sent when the previous operation is completed rather than at regular intervals.
• (of a machine or motor) not working in time with the alternations of current.
• (of a satellite) revolving round the parent planet at a different rate from that at which the planet rotates.