LATIN DICTIONARYLexicon Latīnum
suffix · neutersecond declension

-astrum

-astrum n (genitive -astrī)
Classical[ˈas.trũː]Ecclesiastical[ˈas.trum]

Meaning

  1. morphemeneutersuffix of nouns, expressing incomplete resemblance, hence generally pejorative.

Origins

From -aster.

Quick answers

What does -astrum mean in Latin?
-astrum, a suffix, means “suffix of nouns, expressing incomplete resemblance, hence generally pejorative.”.
How do you pronounce -astrum?
In classical Latin, [ˈas.trũː]; in ecclesiastical (church) Latin, [ˈas.trum].