subsonic: Meaning and Definition of

sub•son•ic

Pronunciation: (sub-son'ik), [key]
— adj.
  1. noting or pertaining to a speed less than that of sound in air at the same height above sea level.
  2. infrasonic.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
See also: