heartbeat(redirected from a heartbeat from)
Also found in: Dictionary, Thesaurus, Medical, Idioms.
Pulsation of the heart coincident with ventricular systole.
The signal emitted by a Level 2 Ethernet transceiver at the end of every packet to show that the collision-detection circuit is still connected.
A periodic synchronisation signal used by software or hardware, such as a bus clock or a periodic interrupt.
The "natural" oscillation frequency of a computer's clock crystal, before frequency division down to the machine's clock rate.
heartbeat(1) A periodic signal generated by hardware for activation and/or synchronization purposes. See MHz.
(2) A periodic signal generated by hardware or software to indicate that it is still running.