Of the two words so rendered is the Authorized Version, one,miphthan, ,seems to mean sometimes a projecting beam or corbel. ( Ezekiel 9:3 ; Ezekiel 10:4Ezekiel 10:18 ) [E] indicates this entry was also found in Easton's Bible Dictionary
Bibliography InformationSmith, William, Dr. "Entry for 'Threshold,'". "Smith's Bible Dictionary". . 1901.