[German version]

A jug or drinking vessel that, derived from Greek κύαθος, is especially a Roman measure of capacity for dry goods and liquids of 45.6 ml. The cyathus amounts to ¹/₁₂ of the sextarius (= 0,55 l). The number of cyathi drunk is counted as a multiple of uncia, e.g. four cyathi are called trientes (= ¹/₃ of the sextarius) or 11 cyathi are called deunx. According to a Roman custom popular at banquets, people had to drink as many cyathi as the number of letters in the name of the one to be honoured. Larger goblets were also used that were a multiple of the cyathus.

 Deunx;  Banquet;  Measure…