Easton's Bible Dictionary: M. G. Easton, M.A., D.D.
Cab
Hollow (R.V., "kab"), occurs only in 2 Ki. 6:25; a dry measure, the sixth part of a seah, and the eighteenth part of an ephah, equal to about two English quarts.
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.