Lewis Short
dēcursĭo (noun F) : decurro
* A running or flowing down (less freq. than decursus; not in Cic.).
* In gen.: aquae,Arn. 2, p. 84.
* In partic., milit. t. t., a manoeuvre, military exercise, evolution, a descent, hostile attack, Brutus ap. Cic. Fam. 11, 10, 4; Hirt. B. G. 8, 24, 3; Auct. B. Alex. 42.—Hence
* Transf., a walking or running in complete armor at a solemnity or for exercise, Suet. Calig. 18; id. Galb. 6.
Charlton T. Lewis, Charles Short, A Latin Dictionary