Strong's #1626: gerah (pronounced gay-raw')
from 1641 (as in 1625); properly, (like 1620) a kernel (round as if scraped), i.e. a gerah or small weight (and coin):-- gerah.
Brown-Driver-Briggs Hebrew Lexicon:
ּ
gêrâh
1) gerah, a weight, a 20th part of a shekel, equal to the weight of 16 barley grains or 4 to 5 carob beans
Part of Speech: noun feminine
Relation: from H1641 (as in H1625)
Usage:
This word is used 5 times:
Exodus 30:13: "of the sanctuary: (a shekel is twenty gerahs:) a half shekel shall be the offering of the LORD."
Leviticus 27:25: "according to the shekel of the sanctuary: twenty gerahs shall be the shekel."
Numbers 3:47: "after the shekel of the sanctuary shalt thou take them: (the shekel is twenty gerahs:)"
Numbers 18:16: "after the shekel of the sanctuary, which is twenty gerahs."
Ezekiel 45:12: "And the shekel shall be twenty gerahs: twenty shekels, five and twenty shekels,"