subsonic Hear it!

subsonic definition

sub·sonic (-sän′ik)

adjective

  1. designating, of, or moving at a speed in a surrounding fluid less than that of sound in the same fluid
  2. infrasonic

Etymology: sub- + sonic

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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