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, Refs 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)
Thayer:
1) one who intervenes between two, either in order to make or restore peace and friendship, or form a compact, or for ratifying a covenant 2) a medium of communication, arbitrator
μεσίτης
mesitēs
mes-ee'-tace
From G3319; a gobetween, that is, (simply) an internunciator, or (by implication) a reconciler (intercessor)
μέσος
mesos
mes'-os
From G3326; middle (as adjective or [neuter] noun)
KJV Usage: among, X before them, between, + forth, mid [-day, -night], midst, way.
G3314 μεσημβρίαμεσημβρία
mesēmbria
mes-ame-bree'-ah
From G3319 and G2250; midday; by implication the south
KJV Usage: noon, south.
G3317 μεσονύκτιονμεσονύκτιον
mesonuktion
mes-on-ook'-tee-on
Neuter of a compound of G3319 and G3571; midnight (especially as a watch)
KJV Usage: midnight.
G3318 ΜεσοποταμίαΜεσοποταμία
Mesopotamia
mes-op-ot-am-ee'-ah
From G3319 and G4215; Mesopotamia (as lying between the Euphrates and the Tigris; compare [H763]), a region of Asia
KJV Usage: Mesopotamia.
G3320 μεσότοιχονμεσότοιχον
mesotoichon
mes-ot'-oy-khon
From G3319 and G5109; a partition (figuratively)
KJV Usage: middle wall.
G3321 μεσουράνημαμεσουράνημα
mesouranēma
mes-oo-ran'-ay-mah
From a presumed compound of G3319 and G3772; mid-sky
KJV Usage: midst of heaven.
G3322 μεσόωμεσόω
mesoō
mes-o'-o
From G3319; to form the middle, that is, (in point of time), to behalfway over