Cyathus 2527 a cup, (from to pour out).

It was a common measure among the Greeks and Romans, both of the liquid and dry kind; equal to an ounce, or the twelfth part of a pint. The sextans was two ounces; the quadrans, three; the triens, four; and were named from the portion of a pint they contained. The quincunx was five ounces; the semis, six; the septunx, seven; the bes, eight; the do-drans, nine; the dextans, ten; the deunx, eleven; the as, sextarius, or Cotula, twelve. The cyathus was made with a handle like our punch ladle. The Romans were used to drink as many cyathi as there were muses; also as many as there were letters in their patron's or their mistress's name. Pliny and Galen say, that a cyathus of the Greeks weighed ten drachms; though the latter elsewhere observes, that a cyathua contains twelve drachms of oil, thirteen drachms and one scruple of wine, water, or vinegar, and eighteen drachms of honey. Among the Veterinarii, the cyathus contained two ounces. The modern cyathus is Cyathus 2529 i. B.