from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Containing water, especially water of crystallization or hydration.

from The Century Dictionary.

  • Containing water; watery.
  • Containing hydrogen.

from the GNU version of the Collaborative International Dictionary of English.

  • adjective Containing water; watery.
  • adjective (Chem.) Containing water of hydration or crystallization.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective chemistry containing combined water; hydrated

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adjective containing combined water (especially water of crystallization as in a hydrate)


Sorry, no etymologies found.


  • Though drivers also consume massive amounts of hydrous ethanol, virtually pure alcohol, such a measure would ease demand for the biofuel.

    Tariff Move Is Bad Timing for Brazil

  • The above program will provide humans with the ability to move about at will in the inner solar system, allowing us to reap the harvest of hydrous resources on certain asteroids/comets (water), and will provide the means for a sustainable profitable, global wealth building space program that will transform the future as much as oil transformed the 20th century.

    NAS Seeks Public Input on Space Goals - NASA Watch

  • The current price of hydrous ethanol, a gasoline substitute in the Brazilian market is around 34 cents a liter.

    Brazil's Sugar Exports to Rise

  • If you query experts on the issue, they will say that hydrous ethanol has water in it that can't be mixed with gasoline.

    Obama blindly supports anhydrous ethanol

  • For whatever reason, no one challenged him with the fact that Brazil uses hydrous ethanol, not anhydrous ethanol.

    Obama blindly supports anhydrous ethanol

  • Technically, gypsum is hydrous calcium sulfate because it has water in its crystal structure, CaSO4. 2H2O.


  • But if you search the keywords "hydrous ethanol" and "gasoline," you will find countless articles relating how it is being done successfully and has been for a very long time in places that were until recently considered third world countries without causing mileage losses or pollution like anhydrous ethanol does.

    Obama blindly supports anhydrous ethanol

  • "Epsom salts" refers to a specific hydrous magnesium sulfate mineral, made famous by its occurrence at a spring in southern England.


  • But if we look at how these other countries use ethanol, we find they do it in a way that doesn't cause these problems while none of our leader seem to know the difference between hydrous and anhydrous ethanol.

    Obama blindly supports anhydrous ethanol

  • Why are we using anhydrous ethanol instead of hydrous ethanol?

    Obama blindly supports anhydrous ethanol


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