1. the parts of the earth and its atmosphere in which living organisms exist or that are capable of supporting life
Usage: plural of biosphere
2. artificial enclosed environments designed to sustain life
Usage: technical; plural of biosphere

Examples

• Scientists study different biospheres to understand how life adapts to various conditions.
• The Earth’s biosphere includes all living things from the deepest ocean to the highest mountains.
• Researchers are designing artificial biospheres for potential space missions.
• Climate change threatens the delicate balance of Earth’s biospheres.
• The experiment involved creating miniature biospheres in sealed containers.
• Marine biospheres contain vastly different organisms than terrestrial ones.