Likewise or similarly in other lexica. The headword (for which see e.g. Herodotus 6.87) and the gloss are simply different spellings of the same word, which relates especially to religious festivals: see e.g. Herodotus loc.cit., and generally LSJ s.v.
Greek inclusive reckoning -- saying five where we say four -- is illustrated here.
See also pi 970, pi 982.