hydro-space

hydrospace

[hahy-druh-speys]
noun
the regions beneath the surface of the oceans and seas.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Science Dictionary
hydrospace   (hī'drə-spās')  Pronunciation Key 
The regions beneath the ocean's surface, especially when considered as an area to be studied, as in marine mammal research or sonar mapping of the ocean floor.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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