Lewis Short
circāmoerĭum (noun N) : circa-moerus, for murus; cf. pomerium
* The space about a wall, on both sides of a wall: pomerium, verbi vim solam intuentes, postmoerium interpretantur esse; est autem magis circamoerium,Liv. 1, 44, 4.
Charlton T. Lewis, Charles Short, A Latin Dictionary