astro-

American  

1. a combining form with the meaning “pertaining to stars or celestial bodies, or to activities, as spaceflight, taking place outside the earth's atmosphere,” used in the formation of compound words.

   astronautics; astrophotography.

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astro- British  

combining form

1. indicating a heavenly body, star, or star-shaped structure

   astrology

   astrocyte

2. indicating outer space

   astronautics

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astro– Scientific  

1. A prefix that means “star” (as in astrophysics), “celestial body” (as in astronomy), or “outer space” (as in astronaut).

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Usage

What does astro- mean? Astro- is a combining form used like a prefix meaning “related to stars, celestial bodies, and outer space.” It is often used in scientific terms, especially in—you guessed it—astronomy.Astro- is also sometimes used to refer to something that is star-shaped, as in an astrocyte, a type of star-shaped cell in the brain and spinal cord.Astro- comes from the Greek ástron, meaning “star.” The Greek ástron is also related to such words as asteroid and even the star itself. The word astronomy comes from a Greek word that literally (and poetically) means “star-arranging.”What are variants of astro-?When combined with words or word elements that begin with a vowel, astro- becomes astr-.

Etymology

Origin of astro-

< Greek, combining form of ástron a star, constellation, akin to astḗr star; aster, -aster ²

Example Sentences

"We've got four grass pitches, a full-size astro pitch and another nine-aside astro," he told the BBC.

From BBC

For the uninitiated—or forgetful—this space-age family sitcom features George and Jane Jetson, living the American dream in an apartment in the sky with their two children, Judy and Elroy, dog Astro and robot maid, Rosey.

From The Wall Street Journal

In 2005, actress Hilary Swank headed to Astro Burger in West Hollywood, still in her gown, after winning the Oscar for Million Dollar Baby.

From BBC

Organisers say there were 154 million livestreams in 2024, when platformer Astro Bot was named Game of the Year.

From BBC

The gritty, sci-fi murder mystery series is based on a reimagining of a story arc from the “Astro Boy” manga, and is set in a world where humans live alongside robots — though the dynamic is a bit different than in “Star Wars.”

From Los Angeles Times