Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
aerusco, āre, v. a. [aes], to get money by going about and exhibiting tricks of legerdemain, to play the juggler: aeruscare: aera undique, id est pecunias, colligere, Paul. ex Fest. p. 24 Müll.
Esp., of mendicant philosophers, Gell. 9, 2; so Sen. Clem. 2, 7, 2.