Strong's G2454 · Greek

Ἰουδαϊσμός

Ioudaismos · ee-oo-dah-is-mos'

from 2450; "Judaism", i.e. the Jewish faith and usages

Scholarly Lexicons

Abbott-Smith Manual Greek Lexicon

 2 † Ἰουδαϊσμός , -οῦ, ὁ ( Ἰουδαΐζω ), [in LXX: II Mac 2:21 8:1 14:38 , IV Mac 4:26 *;] Judaism , the observance of Jewish rites : Ga 1:13 , 14 .† 

G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain