life-support system

noun

: an artificial or natural system that provides all or some of the items (such as oxygen, food, water, control of temperature and pressure, disposition of carbon dioxide and body wastes) necessary for maintaining life or health

Examples of life-support system in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Consider Earth’s life-support systems as analogous to the instrument panel of a complex aircraft. Cornelia C. Walther, Forbes.com, 3 Sep. 2025 Current life-support systems such as those on the International Space Station (ISS) rely on bulky centrifuges to separate the oxygen and hydrogen bubbles created when water is split by electricity, a process known as electrolysis. Andrew Jones, Space.com, 2 Sep. 2025 The breakthrough opens the door to lighter, more robust life-support systems, a critical step toward sustainable human exploration beyond Earth. Neetika Walter, Interesting Engineering, 19 Aug. 2025 Relying on backup life-support systems on the Apollo Lunar Module meant to transport them to the moon's surface from orbit, the astronauts used primitive methods of celestial navigation to make their way back to Earth. Brandi D. Addison, Austin American Statesman, 29 July 2025 See All Example Sentences for life-support system

Word History

First Known Use

1959, in the meaning defined above

Time Traveler
The first known use of life-support system was in 1959

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Cite this Entry

“Life-support system.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/life-support%20system. Accessed 9 Sep. 2025.

Kids Definition

life-support system

noun
: a system that provides all or some of the items (as oxygen, food, water, proper temperature and air pressure, elimination of carbon dioxide and body wastes) necessary for maintaining life or health

Medical Definition

life-support system

noun
: a system that provides all or some of the items (as oxygen, food, water, and disposition of carbon dioxide and body wastes) necessary for maintaining life or health: as
a
: one used to maintain the health of a person or animal in outer space, underwater, or in a mine
b
: one used to maintain the life of an injured or ill person unable to maintain certain physiological processes without artificial support

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