Abbott-Smith Manual Greek Lexicon
μητρό-πολις (G3390)
1 μητρό-πολις , -εως, ἡ , [in LXX for אָב etc.;] a metropolis , chief city : ITi, subscr. (Rec.).†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain
Strong's G3390 · Greek
μητρόπολις
metropolis · may-trop'-ol-is
from 3384 and 4172; a mother city, i.e. "metropolis"