Know how to use "fewer" and "less"? Find out.


[buh-lis-toh-kahr-dee-uh-graf, -grahf] /bəˌlɪs toʊˈkɑr di əˌgræf, -ˌgrɑf/
noun, Medicine/Medical
a device that determines cardiac output by recording the movements of the body caused by contraction of the heart and ejection of blood into the aorta.
1935-40; ballist(ic) + -o- + cardiograph
Related forms
[buh-lis-toh-kahr-dee-og-ruh-fee] /bəˌlɪs toʊˌkɑr diˈɒg rə fi/ (Show IPA),
noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
Cite This Source
ballistocardiography in Medicine

ballistocardiograph bal·lis·to·car·di·o·graph (bə-lĭs'tō-kär'dē-ə-grāf')
A device used to determine the volume of blood passing through the heart in a specific period of time and the force of cardiac contraction by measuring the body's recoil as blood is ejected from the ventricles with each heartbeat.

bal·lis'to·car'di·og'ra·phy (-ŏg'rə-fē) n.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
Encyclopedia Article for ballistocardiography

graphic recording of the stroke volume of the heart for the purpose of calculating cardiac output. The heartbeat results in motion of the body, which in turn causes movements in a suspended supporting structure, usually a special table or bed on which the subject is lying, and these movements are recorded photographically (ballistocardiogram, or BCG) as a series of waves. The BCG is one of the most sensitive measures of the force of the heartbeat, and an abnormality appearing in the BCG of an apparently healthy subject aged 40, or younger, may be suggestive of symptomatic coronary disease.

Learn more about ballistocardiography with a free trial on
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
Cite This Source

Word of the Day

Difficulty index for ballistocardiograph

Few English speakers likely know this word

Word Value for ballistocardiography

Scrabble Words With Friends