a class of priests who served for a stated number of days.
Strong's:
ἐφημερία
diurnality, i.e. (specially) the quotidian rotation or class of the Jewish priests' service at the Temple, as distributed by families Derivation: from G2184;
ἐφ-ημερία, -ας, ἡ (< ἐφήμερος), [in LXX chiefly for מִשְׁמֶרֶת, מַחֲלֹקֶת ;] __1. a course of daily services (Refs Neh.13:30, 1Ch.25:8, al.). __2. a class or course of priests detailed for service in the temple (Refs 1Ch.23:6, al.): Luk.1:5, 8 (cf. MGr., ἐφημέριος, priest).† (AS)
Thayer:
1) a service limited to a stated series of days 2) the class or course itself of priests who for a week at a time performed the duties of the priestly office. David divided the priests into twenty four classes, each of which in its turn discharged the duties of the office for an entire week, from sabbath to sabbath
ἐφημερία
ephēmeria
ef-ay-mer-ee'-ah
From G2184; diurnality, that is, (specifically) the quotidian rotation or class of the Jewish priests’ service at the Temple, as distributed by families