a piece of gold, a disc of gold (see Molina; and see the Codex Mendoza folio 40 recto for "texuelos de oro de tamaño de una ostia y de grosor un dedo")
James Lockhart, Nahuatl as Written: Lessons in Older Written Nahuatl, with Copious Examples and Texts (Stanford: Stanford University Press and UCLA Latin American Studies, 2001), 216.