What is the meaning of omer?

An omer is a dry measure amounting to one tenth of an ephah. (Exodus 16:36)(Exodus 16:16, 18, 22, 32, 33) An Ephah is about 22Liters(20 Dry Quarts) (Ezekiel 45:10+11), so an omer would be about 2.2 Liters (2 dry quarts).