Quantifier (Cardinal Numeral)
Perseus Dictionary Entry (Liddell and Scott [and Jones]'s Greek-English Lexicon, 9th ed., 1925-1940)
μυρίος A. II.
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BDAG lists μυρίος (innumerable/countless) and μύριοι (ten thousand) separately. The meaning
innumerable/countless occurs in the plural in 1 Cor. 4:15 and 14:19. Likewise, the meaning
ten thousand can occur in the singular with collective nouns (see Smyth 351). See χίλιοι in 1 Mc 4:1 and 10:70 as an example: χιλίαν ἵππον, a thousand horse. Per LSJ:
in late Greek...acc. to Gramm., μυρίος (parox.) is the indefinite, μύριος (proparox.) the definite number...; but this distn. is not observed in codd.
Occurrences in the GNT
Occurrences in the LXX