Definition of hydrous in English:

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Pronunciation: /ˈhʌɪdrəs/


chiefly Chemistry & Geology
Containing water as a constituent: a hydrous lava flow
More example sentences
  • Limonite is not a mineral species as such, but rather a mixture of amorphous hydrous iron oxides.
  • Because zeolites form in hydrous environments, typically through alteration of igneous rocks, they may ultimately be found on Mars, if liquid water did once exist on that planet.
  • More likely, however, is that any water would become incorporated in the rock through formation of hydrous minerals as the reaction fronts advance.


Early 19th century: from Greek hudro- 'water' + -ous.

For editors and proofreaders

Line breaks: hy|drous

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