astro-

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astro- or astr-

pref.

a. Star: astrophysics.

b. Celestial body: astrometry.

c. Outer space: astronaut.

2. The aster of a cell: astrosphere.

[Greek, from astron, star; see ster-³ in Indo-European roots.]

astro-

combining form

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

2. indicating outer space astronautics

[from Greek, from astron star]

astro-

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

Translations

astro-

pref → Astro-

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astro-