heartbeat

[hahrt-beet]
noun Physiology.
a pulsation of the heart, including one complete systole and diastole.

Origin:
1840–50; heart + beat

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To heartbeat
Collins
World English Dictionary
heartbeat (ˈhɑːtˌbiːt)
 
n
diastole See systole one complete pulsation of the heart

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
American Heritage
Medical Dictionary

heartbeat heart·beat (härt'bēt')
n.
A single complete pulsation of the heart.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
Slang Dictionary

heartbeat

n.
1. 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.
2. A periodic synchronization signal used by software or hardware, such as a bus clock or a periodic interrupt.
3. The `natural' oscillation frequency of a computer's clock crystal, before frequency division down to the machine's clock rate.
4. A signal emitted at regular intervals by software to demonstrate that it is still alive. Sometimes hardware is designed to reboot the machine if it stops hearing a heartbeat. See also breath-of-life packet.
FOLDOC
Computing Dictionary

heartbeat definition


1. 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.
2. A periodic synchronisation signal used by software or hardware, such as a bus clock or a periodic interrupt.
3. The "natural" oscillation frequency of a computer's clock crystal, before frequency division down to the machine's clock rate.
4. A signal emitted at regular intervals by software to demonstrate that it is still alive. Sometimes hardware is designed to reboot the machine if it stops hearing a heartbeat. See also breath-of-life packet, watchdog.
[Jargon File]
(1996-03-12)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
Cite This Source
Example sentences
Doctors can see the heart pumping, or blood working through the brain after a
  heartbeat.
It can even see your heartbeat racing while you crouch behind the door.
It doesn't disrupt your heartbeat, but it is incredibly muscular.
The interfaces of our souls are designed to be read in a heartbeat.
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature
FAVORITES
RECENT

;