ἐπικαίριος

ον, Adv.
A. πράξεις X. Oec. 5.4, cf. Vett. Val.293.22. Adv. ‐ίως conveniently, ἵδρυται Str. 9.2.15, cf. 10.1.7.
2. . important, τὰ ‐ώτατα τῆς τέχνης X. Oec. 15.11; of persons, οἱ ἐ. the most important persons of the army, Id. Cyr. 3.3.12, cf. HG 3.3.11: c.inf., οἱ θεραπεύεσθαι ἐπικαίριοι those whose cure is all-important, Id. Cyr. 8.2.25.
3. . of parts of the body, vital, τόποι ἐ. Ti.Locr. 102d.
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
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