Dictionary.com
definitions

first heart sound

n.

The heart sound that occurs with ventricular systole and is produced mainly by closure of the atrioventricular valves.

RELATED CONTENT

Queen of HeartsRead more in this article about some frequently asked questions and fun facts related to our definitions.
READ MORE
❤️ - red heart emoji - What does the red heart emoji mean?Read more in this article about some frequently asked questions and fun facts related to our definitions.
READ MORE

Nearby words

  1. first floor,
  2. first four ships,
  3. first fruits,
  4. first gentleman,
  5. first hand,
  6. first in war, first in peace, and first in the hearts of his countrymen,
  7. first intention,
  8. first international,
  9. first lady,
  10. first language
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.