from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The regions beneath the ocean's surface, especially when considered as an area to be studied.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. That part of the Earth, or other planet, that lie below the surface of its lakes, seas and oceans


Sorry, no etymologies found.


  • And you have to hydrospace, shoot through hydrospace and you never know where you're going to come back.

    CNN Transcript Mar 4, 2009

  • Work ranges from surveying and engineering in tidal and coastal areas to geomagnetic and hydrospace seismological observations.

    Discover What You’re Best At


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