Where does “monosyllabicus” come from?

monosyllabicus (Late Latin) comes from Latin monosyllabus, from Ancient Greek μονοσύλλαβος.

Ancestry of “monosyllabicus”, step by step

Step	Language	Word	Meaning
1	Latin	monosyllabus	—
2	Ancient Greek	μονοσύλλαβος	—

monosyllabicus — Etymology, Origin & Word History | Etymology Explorer