The term (also in the nutritional sense) might be derived from
Medieval Latin '''', meaning both "parliamentary assembly" and "daily food allowance", from earlier
Latin , possibly from the Greek ("arbitration"), or
Classical Greek (), meaning "way of living", and hence also "diet" (regular food), "regular (daily) work". Through a
false etymology, reflected in Latin spelling change in medieval Europe that replaced the
ae with
e, the word
diaeta came to be associated with another Latin word , which means "day". Day thus came to be used in postclassical Europe in the sense of "an assembly" and retroactively explained that the day referred to the day of the assembly meeting. The association with
dies is reflected in the
German language's use of (meeting) and also , meaning not only "day", as in (Monday) but also "parliament", "council", or other legislative chamber, as in or for national parliaments, and
Landtag for regional assemblies. == Historic uses ==