Dictionary entry

πῆχυς

G. Abbott-Smith's A Manual Greek Lexicon of the New Testament

πῆχυς, -εως, gen. pl., -ῶν (for Att. -εων, v. WH, App., 157; Thackeray, Gr., 151; Deiss., BS, 153),

[in LXX chiefly and freq. for אַמָּה;]

1. the forearm (Hom.).

2. As a measure of length, a cubit: Mt 6:27, Lk 12:25, Jo 21:8, Re 21:17.†