aerarian

[ee-rair-ee-uh n]Roman History
noun
  1. a member of the lowest class of Roman citizens, who paid a poll tax but did not vote.

Origin of aerarian

1840–50; < Latin aerāri(us) (see aerarium) + -an
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018