Abbott-Smith Manual Greek Lexicon
φρήν (G5424)
2 φρήν gen., φρενός, ἡ , [in LXX most freq. in Pr ( 6:32 , al.) and chiefly for לֵב ; also III Mac 4:16 5:47 ;] chiefly in Hom. and Trag., but also in Plat., al., both sing. and pl.; in physical sense, the parts about the heart, midriff . heart, mind, thought : pl., I Co 14:20 (v. Edwards, Eng.-Gr. Lex. , App. , 1).†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain