What is the meaning of Actus?

A former Roman unit of length, equal to 120 Roman feet (about 35.5 m)

A former Roman unit of area, equivalent to a square with sides of 1 actus (about 0.125 ha)

plural of actu

made, done, having been done.

act, action, doing, deed

performance, behavior

a cattle drive, the act of driving cattle or a cart

a cattle path or narrow cart track

actus (a former Roman unit of length equal to 120 Roman feet (about 35.5 m))

actus (a former Roman unit of area equivalent to a square with sides of 1 actus (about 0.125 ha))

Source: wiktionary.org