Definition of hydrous in English:


Line breaks: hy|drous
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.

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