antoninianus

noun
an·​to·​nin·​i·​a·​nus | \ˌantəˌninēˈānəs\
plural antoniniani\-​ˈāˌnī \

Definition of antoninianus 

: an ancient Roman coin originally worth two denarii

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History and Etymology for antoninianus

Late Latin, literally, of Antoninus, from Marcus Aurelius Antoninus Caracalla †a.d. 217 Roman emperor who introduced it + Latin -ianus -ian

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