more unsoundable

Science Dictionary
sound 1   (sound)  Pronunciation Key 
  1. A type of longitudinal wave that originates as the vibration of a medium (such as a person's vocal cords or a guitar string) and travels through gases, liquids, and elastic solids as variations of pressure and density. The loudness of a sound perceived by the ear depends on the amplitude of the sound wave and is measured in decibels, while its pitch depends on its frequency, measured in hertz.

  2. The sensation produced in the organs of hearing by waves of this type. See Note at ultrasound.


American Heritage
Science Dictionary
sound 2   (sound)  Pronunciation Key 
  1. A long, wide inlet of the ocean, often parallel to the coast. Long Island Sound, between Long Island and the coast of New England, is an example.

  2. A long body of water, wider than a strait, that connects larger bodies of water.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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