cubit-a measure of distance (the forearm), roughly 18 in (. 5m). There are several cubits used in the OT, the cubit of a man or common cubit (De 3:11), the legal cubit or cubit of the sanctuary (Eze 40:5) plus others. See a Bible Dictionary for a complete treatment.
Aramaic equivalent: am.mah (אַמָּה "cubit" H0521)