520  'ammah  am-maw'

 prolonged from 517; 
properly, a mother (i.e. unit 
of measure, or the fore-arm 
(below the elbow), i.e. a 
cubit; also a door-base (as a 
bond of the entrance):--
cubit, + hundred (by exchange 
for 3967), measure, post.

 see HEBREW for 0517

 see HEBREW for 03967