1. Plural of hydrosphere; all the water found on, under, and above the surface of a planet, especially Earth, including oceans, lakes, rivers, groundwater, ice, and water vapor in the atmosphere.
Usage: Usually used in scientific and educational contexts; Can refer to the hydrosphere of any planet or celestial body

Examples

• The hydrospheres of Earth and Mars differ greatly in their composition and extent.
• Scientists study hydrospheres to understand climate patterns and water distribution.
• The hydrospheres of different planets reveal important information about their geological history.
• Earth's hydrospheres include the Pacific, Atlantic, Indian, Arctic, and Southern Oceans.
• Comparing hydrospheres across planets helps us understand the conditions necessary for life.