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Definition of hydrous : 1. Containing water of hydration or crystallization.
2. Containing water; watery.

Synonyms:

hydrated

Usage examples:

• A subordinate amount may come directly from igneous emanations or from destruction of certain hydrous minerals. - "The Economic Aspect of Geology", C. K. Leith.
• Under ordinary weathering conditions the kaolin is stable; but under favorable conditions, such as obtain in the weathered zones of tropical climates, it is broken up, the silica is taken into solution and carried away, and hydrous aluminum oxides remain as bauxite ores. - "The Economic Aspect of Geology", C. K. Leith.
• Apparently the special character which distinguishes laterite from other forms of red- coloured weathering is the presence of hydrous oxide of alumina in varying proportions. - "Rambles and Recollections of an Indian Official", William Sleeman.