Astro- - Dictionary Of English

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astro- [links] ⓘ One or more forum threads is an exact match of your searched term in Spanish | in French | in Italian | English synonyms | English Usage | Conjugator | in context | images WordReference Random House Learner's Dictionary of American English © 2025-astro-, root.
  1. Aerospace, Astronomy-astro-, or -aster-, comes from Greek, where it has the meanings "star; heavenly body; outer space.'' These meanings are found in such words as: aster, asterisk, asteroid, astrology, astronomy, astronaut, astronautics, disaster.
WordReference Random House Unabridged Dictionary of American English © 2025astro-,
  1. Aerospace, Astronomya 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.
Cf. cosmo-.
  • Greek, combining form of ástron a star, constellation, akin to asté̄r star; compare aster, -aster2
Collins Concise English Dictionary © HarperCollins Publishers:: astro- combining form
  1. indicating a heavenly body, star, or star-shaped structure: astrology, astrocyte
Etymology: from Greek, from astron star 'astro-' also found in these entries (note: many are not synonyms or translations): astrology - astronaut - astronomy - Astroturf - disaster - aster - astroarchaeology - astrobiology - astrobleme - astrochemistry - astrocyte - astrodome - astrodynamics - astrogate - astrogeology - astrograph - astro-inertial guidance - astrolabe - astromancy - astrometeorology - astrometry - astronautical - astronavigation - astrophotography - astrophotometry - astrophysics - astrosphere - celestial guidance - cosmo-

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