LATIN DICTIONARYLexicon Latīnum
suffixfirst/second-declension suffix

-dicus

-dicus (feminine -dica, neuter -dicum, comparative -dīcentior, superlative -dīcentissimus)
Classical[dɪ.kʊs]Ecclesiastical[di.kus]

Meaning

  1. morphemesuffix-saying

Origins

From dīcō (“to say”) + -us (adjective-forming suffix).

Quick answers

What does -dicus mean in Latin?
-dicus, a suffix, means “-saying”.
How do you pronounce -dicus?
In classical Latin, [dɪ.kʊs]; in ecclesiastical (church) Latin, [di.kus].