English Explanatory Dictionary

astro-

English dictionary entry

Meanings

prefix
  1. celestial bodies: fixed stars, wandering stars (planets), etc.; space; astronomy
  2. stars

Word forms

astro-

Etymology

Etymology tree Proto-Indo-European *h₂eHs- Proto-Indo-European *-tḗr Proto-Indo-European *h₂stḗr Proto-Hellenic *astḗr Ancient Greek ἀστήρ (astḗr) Ancient Greek ᾰ̓́στρον (ắstron)der. English astro- From Ancient Greek ἄστρον (ástron, “celestial body”).

Related words

aster

Derived words

astrogation astrolabe astrologer astrology astronaut astronautics astronomical astronomer astronomy astrophysics
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