Definition of nummion in US English:

nummion

noun

  • A Byzantine copper coin, equal to one fortieth of a follis. Chiefly in plural.

Origin

Early 20th century. From Byzantine Greek νουμίον, νουμμίον from ancient Greek νοῦμμος coin (probably from classical Latin nummus: see nummi-) + -ίον, diminutive suffix.

Pronunciation

nummion

/ˈnʌmɪɒn/