Any public office held by rotation for given periods; e. g. in Herodotus (vi. 110) the
chief command for the day, held by each of the ten generals in turn.
The period of thirty-five or thirty-six days, i. e. about one-tenth of the year, during
which each of the ten phylae
presided in turn over the
Boulé and Ecclesia. The order was determined by lot. The presiding tribe was
represented by its epistates
, who was appointed by lot to preside for
the day, and could not hold this office more than once in each year (Aristot. Athen.
44). See Boulé