Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
satum, i, n., = σάτον, a Hebrew measure of corn, etc., containing about a modius and a half (eccl. Lat.), Vulg. Gen. 18, 6; id. Matt. 13, 33; id. Luc. 13, 21.