Definition of astro- in English:


Pronunciation: /ˈastrəʊ/

combining form

1Relating to the stars or celestial objects: astrodome astrophotography
1.1Relating to outer space: astrochemistry


from Greek astron 'star'.

Definition of astro- in:

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Word of the day anomalous
Pronunciation: əˈnɒm(ə)ləs
deviating from what is standard, normal, or expected