Extended Strong's Greek Lexicon (Abbott-Smith based)
mediator
Usage: μεσίτης, -ου, ὁ (μέσος), [in LXX: Job.9:33 (בֵּין)* ;] an arbitrator, mediator: Gal.3:19; with dupl. genitive of person(s), θεοῦ κ. ἀνθρώπων, 1Ti.2:5; with genitive of thing(s), διαθήκης, Heb.8:6 9:15 12:24; ὁ δε μ. ἑνὸς οὐκ ἔστιν, Gal.3:20 (see Lft., in l; and for exx. of this word in π., see MM, xvi).† (AS)