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Easton's Bible Dictionary
A bean, probably of the carob tree, the smallest weight, and also the smallest piece of money, among the Hebrews, equal to the twentieth part of a shekel (Exodus 30:13
; Leviticus 27:25
; Numbers 3:47
). This word came into use in the same way as our word "grain," from a grain of wheat.
These dictionary topics are from M.G. Easton M.A., D.D., Illustrated Bible Dictionary, Third Edition, published by Thomas Nelson, 1897. Public Domain.
Easton, Matthew George. Entry for 'Gerah'. Easton's Bible Dictionary. https://www.studylight.org/dictionaries/eng/ebd/g/gerah.html. 1897.