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astro-(word root) star
Examples of words with the root astro-: astrophysics
Abused, Confused, & Misused Words by Mary Embree Copyright © 2007, 2013 by Mary Embree
a. Star: astrophysics.
b. Celestial body: astrometry.
c. Outer space: astronaut.
2. The aster of a cell: astrosphere.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
1. indicating a heavenly body, star, or star-shaped structure: astrology; astrocyte.
2. indicating outer space: astronautics.
[from Greek, from astron star]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a combining form with the meaning “pertaining to stars or celestial bodies, or to activities, as spaceflight, taking place outside the earth's atmosphere”: astronautics; astrophotography.
[< Greek, comb. form of ástron a star, constellation, akin to astḗr star]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
A prefix that means "star" (as in astrophysics), "celestial body" (as in astronomy), or "outer space" (as in astronaut).
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
pref → Astro-
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007