microgravity

noun

mi·​cro·​grav·​i·​ty ˌmī-krə-ˈgra-və-tē How to pronounce microgravity (audio)
: a condition in space in which only minuscule forces are experienced : virtual absence of gravity
broadly : a condition of weightlessness

Examples of microgravity 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.
Other experiments will investigate the effects of microgravity on the human musculoskeletal system during spaceflight. Josh Dinner, Space.com, 7 May 2025 Timeline of Boeing's Starliner mission that left NASA astronauts aboard ISS for 9 months Changes due to microgravity One of the biggest changes comes from spending time in microgravity, which allows astronauts to float inside a spacecraft or outside during spacewalks. Mary Kekatos, ABC News, 18 Mar. 2025 Humans have yet to visit Mars, a transit estimated to take between six and 12 months, that will expose astronauts to other concerns, such as radiation and the effects of microgravity. Madison Dapcevich, Discover Magazine, 25 Apr. 2025 Often, these videos include acrobatic backflips or show the novelty of eating and drinking in microgravity. ArsTechnica, 22 Apr. 2025 See All Example Sentences for microgravity

Word History

First Known Use

1974, in the meaning defined above

Time Traveler
The first known use of microgravity was in 1974

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Cite this Entry

“Microgravity.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/microgravity. Accessed 2 Jun. 2025.

Kids Definition

microgravity

noun
mi·​cro·​grav·​i·​ty ˌmī-krə-ˈgrav-ət-ē How to pronounce microgravity (audio)
: the condition of being weightless or of the near absence of gravity

More from Merriam-Webster on microgravity

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