Green’s Dictionary of Slang

aurium n.

[? Lat. aurius, an ear, i.e. that which hears confession]

(UK Und.) a wandering beggar posing as some type of priest.

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[UK]Cocke Lorelles Bote Bii: With adam auereus stayle swenger.
[UK]R. Copland Hye way to the Spyttel House Cii: For by lettres they name them as they be / P. a Pardoner; Clewner a C. / R. a Roger; A an Aurium, and a Sapient, S.